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The 2005 season’s official transaction log: 1,427 trades, signings and releases involving major-league clubs, listed newest first.
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Dec 30, 2005 | Signed as free agent | Mike Bynum | — | Detroit Tigers | Free agent signing |
| Dec 30, 2005 | Signed as free agent | Travis Dawkins | — | Pittsburgh Pirates | Free agent signing |
| Dec 30, 2005 | Signed as free agent | Mike Edwards | — | Pittsburgh Pirates | Free agent signing |
| Dec 30, 2005 | Signed as free agent | Kerry Ligtenberg | — | Florida Marlins | Free agent signing |
| Dec 29, 2005 | Signed as free agent | Ramon Ortiz | — | Washington Nationals | Free agent signing |
| Dec 29, 2005 | Signed as free agent | Curtis Pride | — | Los Angeles Angels of Anaheim | Free agent signing |
| Dec 28, 2005 | Signed as free agent | Giovanni Carrara | — | Pittsburgh Pirates | Free agent signing |
| Dec 27, 2005 | Signed as free agent | Chad Bradford | — | New York Mets | Free agent signing |
| Dec 27, 2005 | Signed as free agent | Eric Byrnes | — | Arizona Diamondbacks | Free agent signing |
| Dec 27, 2005 | Signed as free agent | Mark DiFelice | — | Chicago Cubs | Free agent signing |
| Dec 27, 2005 | Signed as free agent | Frank Gracesqui | — | Baltimore Orioles | Free agent signing |
| Dec 27, 2005 | Trade | Troy Glaus | Arizona Diamondbacks | Toronto Blue Jays | Trade |
| Dec 27, 2005 | Trade | Sergio Santos | Arizona Diamondbacks | Toronto Blue Jays | Trade |
| Dec 27, 2005 | Trade | Miguel Batista | Toronto Blue Jays | Arizona Diamondbacks | Trade |
| Dec 27, 2005 | Trade | Orlando Hudson | Toronto Blue Jays | Arizona Diamondbacks | Trade |
| Dec 26, 2005 | Signed as free agent | Kevin Orie | — | Houston Astros | Free agent signing |
| Dec 26, 2005 | Signed as free agent | Simon Pond | — | San Diego Padres | Free agent signing |
| Dec 26, 2005 | Signed as free agent | Francisco Rodriguez | — | Los Angeles Angels of Anaheim | Free agent signing with first major-league team |
| Dec 26, 2005 | Signed | Eduardo Sanchez | — | St. Louis Cardinals | Amateur free agent signing |
| Dec 26, 2005 | Signed as free agent | Tom Shearn | — | Cincinnati Reds | Free agent signing |
| Dec 25, 2005 | Signed as free agent | Tim Salmon | — | Los Angeles Angels of Anaheim | Free agent signing |
| Dec 24, 2005 | Signed as free agent | Mike Stanton | — | Washington Nationals | Free agent signing |
| Dec 23, 2005 | Signed as free agent | Dave Berg | — | St. Louis Cardinals | Free agent signing |
| Dec 23, 2005 | Signed as free agent | Einar Diaz | — | Cleveland Indians | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Mark Bellhorn | — | San Diego Padres | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Dave Borkowski | — | Houston Astros | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Endy Chavez | — | New York Mets | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Matt Ford | — | Minnesota Twins | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Jason Grimsley | — | Arizona Diamondbacks | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Mark Johnson | — | Milwaukee Brewers | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Todd Jones | — | Detroit Tigers | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Braden Looper | — | St. Louis Cardinals | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Julio Manon | — | Baltimore Orioles | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Eric Munson | — | Houston Astros | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Nerio Rodriguez | — | Pittsburgh Pirates | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Brian Sikorski | — | San Diego Padres | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Jarrod Washburn | — | Seattle Mariners | Free agent signing |
| Dec 22, 2005 | Signed as free agent | Rondell White | — | Minnesota Twins | Free agent signing |
| Dec 21, 2005 | Signed as free agent | Lance Carter | — | Tampa Bay Devil Rays | Free agent signing |
| Dec 21, 2005 | Signed as free agent | Tomas de la Rosa | — | San Francisco Giants | Free agent signing |
| Dec 21, 2005 | Signed as free agent | Nate Field | — | Colorado Rockies | Free agent signing |
| Dec 21, 2005 | Signed as free agent | Ben Kozlowski | — | Cincinnati Reds | Free agent signing |
| Dec 21, 2005 | Released | Mike Lincoln | St. Louis Cardinals | — | Release |
| Dec 21, 2005 | Signed as free agent | Sidney Ponson | — | St. Louis Cardinals | Free agent signing |
| Dec 21, 2005 | Signed as free agent | John Riedling | — | St. Louis Cardinals | Free agent signing |
| Dec 21, 2005 | Released | Ryan Spilborghs | Colorado Rockies | — | Release |
| Dec 21, 2005 | Signed as free agent | Ryan Spilborghs | — | Colorado Rockies | Free agent signing |
| Dec 21, 2005 | Signed as free agent | Shawn Wooten | — | Minnesota Twins | Free agent signing |
| Dec 21, 2005 | Trade | Chris Demaria | Kansas City Royals | Milwaukee Brewers | Trade |
| Dec 21, 2005 | Trade | Justin Barnes | Milwaukee Brewers | Kansas City Royals | Trade |
| Dec 21, 2005 | Trade | Steve Finley | Los Angeles Angels of Anaheim | San Francisco Giants | Trade |
| Dec 21, 2005 | Trade | Edgardo Alfonzo | San Francisco Giants | Los Angeles Angels of Anaheim | Trade |
| Dec 20, 2005 | Signed as free agent | Winston Abreu | — | Baltimore Orioles | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Peter Bergeron | — | Philadelphia Phillies | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Howie Clark | — | Baltimore Orioles | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Eric Crozier | — | Cincinnati Reds | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Brian Daubach | — | St. Louis Cardinals | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Eddy Garabito | — | Baltimore Orioles | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Chris Hammond | — | Cincinnati Reds | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Kenny Lofton | — | Los Angeles Dodgers | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Rudy Seanez | — | Boston Red Sox | Free agent signing |
| Dec 20, 2005 | Signed | Moises Sierra | — | Toronto Blue Jays | Amateur free agent signing |
| Dec 20, 2005 | Signed as free agent | Joakim Soria | — | San Diego Padres | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Andres Torres | — | Minnesota Twins | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Chris Truby | — | Los Angeles Dodgers | Free agent signing |
| Dec 20, 2005 | Signed as free agent | Jason Wood | — | Florida Marlins | Free agent signing |
| Dec 20, 2005 | Trade | Orlando Hernandez | Chicago White Sox | Arizona Diamondbacks | Trade |
| Dec 20, 2005 | Trade | Luis Vizcaino | Chicago White Sox | Arizona Diamondbacks | Trade |
| Dec 20, 2005 | Trade | Chris Young | Chicago White Sox | Arizona Diamondbacks | Trade |
| Dec 20, 2005 | Trade | Javier Vazquez | Arizona Diamondbacks | Chicago White Sox | Trade |
| Dec 19, 2005 | Signed as free agent | Andy Abad | — | Cincinnati Reds | Free agent signing |
| Dec 19, 2005 | Released | Joe Borowski | Tampa Bay Devil Rays | — | Release |
| Dec 19, 2005 | Released | Mike Edwards | Los Angeles Dodgers | — | Release |
| Dec 19, 2005 | Signed as free agent | Rafael Furcal | — | Los Angeles Dodgers | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Nomar Garciaparra | — | Los Angeles Dodgers | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Danny Graves | — | Cleveland Indians | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Jed Hansen | — | San Francisco Giants | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Steve Karsay | — | Cleveland Indians | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Jose Mesa | — | Colorado Rockies | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Bart Miadich | — | Tampa Bay Devil Rays | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Luis Ordaz | — | Tampa Bay Devil Rays | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Travis Phelps | — | Cincinnati Reds | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Ricardo Rincon | — | St. Louis Cardinals | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Max St. Pierre | — | Detroit Tigers | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Mac Suzuki | — | Oakland Athletics | Free agent signing |
| Dec 19, 2005 | Signed as free agent | Steve Watkins | — | Washington Nationals | Free agent signing |
| Dec 19, 2005 | Trade | Ricardo Rodriguez | Texas Rangers | Philadelphia Phillies | Trade |
| Dec 19, 2005 | Trade | Matt Diaz | Kansas City Royals | Atlanta Braves | Trade |
| Dec 19, 2005 | Trade | Ricardo Rodriguez | Atlanta Braves | Kansas City Royals | Trade |
| Dec 19, 2005 | Trade | Josh Paul | Los Angeles Angels of Anaheim | Tampa Bay Devil Rays | Trade |
| Dec 19, 2005 | Trade | Travis Schlichting | Tampa Bay Devil Rays | Los Angeles Angels of Anaheim | Trade |
| Dec 16, 2005 | Signed as free agent | Cory Aldridge | — | New York Mets | Free agent signing |
| Dec 16, 2005 | Signed as free agent | Paul Bako | — | Kansas City Royals | Free agent signing |
| Dec 16, 2005 | Signed as free agent | John Barnes | — | Boston Red Sox | Free agent signing |
| Dec 16, 2005 | Signed as free agent | Doug Brocail | — | San Diego Padres | Free agent signing |
| Dec 16, 2005 | Signed as free agent | Kyle Denney | — | Washington Nationals | Free agent signing |
| Dec 16, 2005 | Signed as free agent | Scott Elarton | — | Kansas City Royals | Free agent signing |
| Dec 16, 2005 | Signed as free agent | Mark Grudzielanek | — | Kansas City Royals | Free agent signing |
| Dec 16, 2005 | Released | Ken Harvey | Kansas City Royals | — | Release |
| Dec 16, 2005 | Signed as free agent | Ben Howard | — | Cleveland Indians | Free agent signing |
| Dec 16, 2005 | Signed as free agent | D'Angelo Jimenez | — | Texas Rangers | Free agent signing |
| Dec 16, 2005 | Signed as free agent | Tim Laker | — | Cleveland Indians | Free agent signing |
| Dec 16, 2005 | Signed as free agent | Doug Mientkiewicz | — | Kansas City Royals | Free agent signing |
| Dec 16, 2005 | Signed as free agent | Mike Myers | — | New York Yankees | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Tony Batista | — | Minnesota Twins | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Buddy Carlyle | — | Florida Marlins | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Matthew Cepicky | — | Florida Marlins | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Brad Clontz | — | Florida Marlins | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Damion Easley | — | Arizona Diamondbacks | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Jared Fernandez | — | Milwaukee Brewers | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Steve Green | — | Detroit Tigers | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Roberto Hernandez | — | Pittsburgh Pirates | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Mike Kinkade | — | Florida Marlins | Free agent signing |
| Dec 15, 2005 | Signed as free agent | David Lee | — | Chicago Cubs | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Bill Mueller | — | Los Angeles Dodgers | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Beltran Perez | — | Washington Nationals | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Matt Perisho | — | New York Mets | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Brian Reith | — | Chicago Cubs | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Guillermo Rodriguez | — | San Francisco Giants | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Kenny Rogers | — | Detroit Tigers | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Ryan Rupe | — | Florida Marlins | Free agent signing |
| Dec 15, 2005 | Signed as free agent | Chad Santos | — | San Francisco Giants | Free agent signing |
| Dec 14, 2005 | Released | Cha-Seung Baek | Seattle Mariners | — | Release |
| Dec 14, 2005 | Signed as free agent | Rob Bell | — | Cleveland Indians | Free agent signing |
| Dec 14, 2005 | Signed as free agent | Nate Bland | — | Los Angeles Angels of Anaheim | Free agent signing |
| Dec 14, 2005 | Signed as free agent | Matt Childers | — | New York Yankees | Free agent signing |
| Dec 14, 2005 | Signed as free agent | Jose Flores | — | Cleveland Indians | Free agent signing |
| Dec 14, 2005 | Signed as free agent | Jason Hart | — | Minnesota Twins | Free agent signing |
| Dec 14, 2005 | Signed as free agent | Ryan Ludwick | — | Detroit Tigers | Free agent signing |
| Dec 14, 2005 | Signed as free agent | Sandy Martinez | — | New York Mets | Free agent signing |
| Dec 14, 2005 | Signed as free agent | Julio Ramirez | — | New York Mets | Free agent signing |
| Dec 14, 2005 | Signed as free agent | Andy Tracy | — | Cleveland Indians | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Sandy Alomar | — | Los Angeles Dodgers | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Brad Ausmus | — | Houston Astros | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Napoleon Calzado | — | Baltimore Orioles | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Alberto Castillo | — | Washington Nationals | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Scott Chiasson | — | Cincinnati Reds | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Jayson Durocher | — | Texas Rangers | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Joey Eischen | — | Washington Nationals | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Robert Fick | — | Washington Nationals | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Ramon Hernandez | — | Baltimore Orioles | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Norris Hopper | — | Cincinnati Reds | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Kevin Jarvis | — | Arizona Diamondbacks | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Matt Morris | — | San Francisco Giants | Free agent signing |
| Dec 13, 2005 | Signed as free agent | Todd Pratt | — | Atlanta Braves | Free agent signing |
| Dec 13, 2005 | Trade | Milton Bradley | Los Angeles Dodgers | Oakland Athletics | Trade |
| Dec 13, 2005 | Trade | Antonio Perez | Los Angeles Dodgers | Oakland Athletics | Trade |
| Dec 13, 2005 | Trade | Andre Ethier | Oakland Athletics | Los Angeles Dodgers | Trade |
| Dec 13, 2005 | Trade | Damaso Marte | Chicago White Sox | Pittsburgh Pirates | Trade |
| Dec 13, 2005 | Trade | Rob Mackowiak | Pittsburgh Pirates | Chicago White Sox | Trade |
| Dec 12, 2005 | Signed as free agent | Elmer Dessens | — | Kansas City Royals | Free agent signing |
| Dec 12, 2005 | Signed as free agent | Julio Franco | — | New York Mets | Free agent signing |
| Dec 12, 2005 | Signed as free agent | Orlando Palmeiro | — | Houston Astros | Free agent signing |
| Dec 12, 2005 | Signed | Michael Pineda | — | Seattle Mariners | Amateur free agent signing |
| Dec 12, 2005 | Signed as free agent | Earl Snyder | — | Cincinnati Reds | Free agent signing |
| Dec 12, 2005 | Signed as free agent | Jose Valentin | — | New York Mets | Free agent signing |
| Dec 12, 2005 | Signed as free agent | Jose Veras | — | New York Yankees | Free agent signing |
| Dec 12, 2005 | Trade | Vicente Padilla | Philadelphia Phillies | Texas Rangers | Trade |
| Dec 12, 2005 | Signed | Alfredo Marte | — | Arizona Diamondbacks | Amateur free agent signing |
| Dec 12, 2005 | Signed as free agent | Cody Clark | — | Atlanta Braves | Free agent signing |
| Dec 11, 2005 | Signed as free agent | Steve Stemle | — | Kansas City Royals | Free agent signing |
| Dec 10, 2005 | Released | Jason Grabowski | Los Angeles Dodgers | — | Release |
| Dec 9, 2005 | Signed as free agent | Doug Clark | — | Oakland Athletics | Free agent signing |
| Dec 9, 2005 | Signed as free agent | Mike Colangelo | — | Florida Marlins | Free agent signing |
| Dec 9, 2005 | Signed as free agent | Jack Cust | — | San Diego Padres | Free agent signing |
| Dec 9, 2005 | Signed as free agent | Travis Driskill | — | Tampa Bay Devil Rays | Free agent signing |
| Dec 9, 2005 | Signed as free agent | Devern Hansack | — | Boston Red Sox | Free agent signing |
| Dec 9, 2005 | Released | Kazuhisa Ishii | New York Mets | — | Release |
| Dec 9, 2005 | Signed as free agent | Jason Karnuth | — | Oakland Athletics | Free agent signing |
| Dec 9, 2005 | Signed as free agent | Scott McClain | — | Oakland Athletics | Free agent signing |
| Dec 9, 2005 | Signed as free agent | Lou Merloni | — | Cleveland Indians | Free agent signing |
| Dec 9, 2005 | Signed as free agent | Jimmy Serrano | — | Boston Red Sox | Free agent signing |
| Dec 9, 2005 | Signed as free agent | Josh Stewart | — | Florida Marlins | Free agent signing |
| Dec 9, 2005 | Trade | Alexi Casilla | Los Angeles Angels of Anaheim | Minnesota Twins | Trade |
| Dec 9, 2005 | Trade | J. C. Romero | Minnesota Twins | Los Angeles Angels of Anaheim | Trade |
| Dec 8, 2005 | Signed as free agent | Joe McEwing | — | Kansas City Royals | Free agent signing |
| Dec 8, 2005 | Signed as free agent | Mark Sweeney | — | San Francisco Giants | Free agent signing |
| Dec 8, 2005 | Released | Ty Wigginton | Pittsburgh Pirates | — | Release |
| Dec 8, 2005 | Trade | Clayton Hamilton | San Diego Padres | Pittsburgh Pirates | Trade |
| Dec 8, 2005 | Trade | Gio Gonzalez | Chicago White Sox | Philadelphia Phillies | Trade |
| Dec 8, 2005 | Trade | Dustin Majewski | Oakland Athletics | Toronto Blue Jays | Trade |
| Dec 8, 2005 | Trade | Esteban German | Texas Rangers | Kansas City Royals | Trade |
| Dec 8, 2005 | Trade | Fabio Castro | Kansas City Royals | Texas Rangers | Trade |
| Dec 8, 2005 | Trade | Unnamed | Cincinnati Reds | Pittsburgh Pirates | $ |
| Dec 8, 2005 | Trade | Sean Casey | Cincinnati Reds | Pittsburgh Pirates | Trade |
| Dec 8, 2005 | Trade | David Williams | Pittsburgh Pirates | Cincinnati Reds | Trade |
| Dec 8, 2005 | Trade | Unnamed | New York Yankees | Cincinnati Reds | $ |
| Dec 8, 2005 | Trade | Tony Womack | New York Yankees | Cincinnati Reds | Trade |
| Dec 8, 2005 | Trade | Kevin Howard | Cincinnati Reds | New York Yankees | Trade |
| Dec 8, 2005 | Trade | Ben Himes | Cincinnati Reds | New York Yankees | Trade |
| Dec 8, 2005 | Trade | Unnamed | Boston Red Sox | Atlanta Braves | $ |
| Dec 8, 2005 | Trade | Edgar Renteria | Boston Red Sox | Atlanta Braves | Trade |
| Dec 8, 2005 | Trade | Andy Marte | Atlanta Braves | Boston Red Sox | Trade |
| Dec 8, 2005 | Trade | Alfonso Soriano | Texas Rangers | Washington Nationals | Trade |
| Dec 8, 2005 | Trade | Brad Wilkerson | Washington Nationals | Texas Rangers | Trade |
| Dec 8, 2005 | Trade | Armando Galarraga | Washington Nationals | Texas Rangers | Trade |
| Dec 8, 2005 | Trade | Terrmel Sledge | Washington Nationals | Texas Rangers | Trade |
| Dec 7, 2005 | Signed as free agent | A. J. Burnett | — | Toronto Blue Jays | Free agent signing |
| Dec 7, 2005 | Signed as free agent | Paul Byrd | — | Cleveland Indians | Free agent signing |
| Dec 7, 2005 | Signed as free agent | Jacob Cruz | — | Cincinnati Reds | Free agent signing |
| Dec 7, 2005 | Released | Jeff DaVanon | Los Angeles Angels of Anaheim | — | Release |
| Dec 7, 2005 | Signed as free agent | Lenny Harris | — | Florida Marlins | Free agent signing |
| Dec 7, 2005 | Signed as free agent | Trevor Hoffman | — | San Diego Padres | Free agent signing |
| Dec 7, 2005 | Released | Randy Keisler | Cincinnati Reds | — | Release |
| Dec 7, 2005 | Signed as free agent | John Mabry | — | Chicago Cubs | Free agent signing |
| Dec 7, 2005 | Signed as free agent | Brian Moehler | — | Florida Marlins | Free agent signing |
| Dec 7, 2005 | Signed as free agent | Jamie Moyer | — | Seattle Mariners | Free agent signing |
| Dec 7, 2005 | Signed as free agent | Olmedo Saenz | — | Los Angeles Dodgers | Free agent signing |
| Dec 7, 2005 | Signed | Pedro Viola | — | Cincinnati Reds | Amateur free agent signing |
| Dec 7, 2005 | Signed as free agent | John Wasdin | — | Texas Rangers | Free agent signing |
| Dec 7, 2005 | Signed as free agent | Bob Wickman | — | Cleveland Indians | Free agent signing |
| Dec 7, 2005 | Trade | Dave Bush | Toronto Blue Jays | Milwaukee Brewers | Trade |
| Dec 7, 2005 | Trade | Gabe Gross | Toronto Blue Jays | Milwaukee Brewers | Trade |
| Dec 7, 2005 | Trade | Zach Jackson | Toronto Blue Jays | Milwaukee Brewers | Trade |
| Dec 7, 2005 | Trade | Lyle Overbay | Milwaukee Brewers | Toronto Blue Jays | Trade |
| Dec 7, 2005 | Trade | Ty Taubenheim | Milwaukee Brewers | Toronto Blue Jays | Trade |
| Dec 7, 2005 | Trade | Dewon Brazelton | Tampa Bay Devil Rays | San Diego Padres | Trade |
| Dec 7, 2005 | Trade | Sean Burroughs | San Diego Padres | Tampa Bay Devil Rays | Trade |
| Dec 7, 2005 | Trade | Larry Bigbie | Colorado Rockies | St. Louis Cardinals | Trade |
| Dec 7, 2005 | Trade | Aaron Miles | Colorado Rockies | St. Louis Cardinals | Trade |
| Dec 7, 2005 | Trade | Ray King | St. Louis Cardinals | Colorado Rockies | Trade |
| Dec 7, 2005 | Trade | Doug Mirabelli | Boston Red Sox | San Diego Padres | Trade |
| Dec 7, 2005 | Trade | Mark Loretta | San Diego Padres | Boston Red Sox | Trade |
| Dec 7, 2005 | Trade | Jonah Bayliss | Kansas City Royals | Pittsburgh Pirates | Trade |
| Dec 7, 2005 | Trade | Chad Blackwell | Kansas City Royals | Pittsburgh Pirates | Trade |
| Dec 7, 2005 | Trade | Mark Redman | Pittsburgh Pirates | Kansas City Royals | Trade |
| Dec 7, 2005 | Trade | Danny Kolb | Atlanta Braves | Milwaukee Brewers | Trade |
| Dec 7, 2005 | Trade | Wes Obermueller | Milwaukee Brewers | Atlanta Braves | Trade |
| Dec 7, 2005 | Trade | Juan Pierre | Florida Marlins | Chicago Cubs | Trade |
| Dec 7, 2005 | Trade | Sergio Mitre | Chicago Cubs | Florida Marlins | Trade |
| Dec 7, 2005 | Trade | Ricky Nolasco | Chicago Cubs | Florida Marlins | Trade |
| Dec 7, 2005 | Trade | Renyel Pinto | Chicago Cubs | Florida Marlins | Trade |
| Dec 7, 2005 | Trade | Yorvit Torrealba | Seattle Mariners | Colorado Rockies | Trade |
| Dec 7, 2005 | Trade | Marcos Carvajal | Colorado Rockies | Seattle Mariners | Trade |
| Dec 7, 2005 | Trade | Johnny Estrada | Atlanta Braves | Arizona Diamondbacks | Trade |
| Dec 7, 2005 | Trade | Lance Cormier | Arizona Diamondbacks | Atlanta Braves | Trade |
| Dec 7, 2005 | Trade | Oscar Villarreal | Arizona Diamondbacks | Atlanta Braves | Trade |
| Dec 6, 2005 | Released | D. J. Carrasco | Kansas City Royals | — | Release |
| Dec 6, 2005 | Signed as free agent | Tim Crabtree | — | Detroit Tigers | Free agent signing |
| Dec 6, 2005 | Signed as free agent | Tom Gordon | — | Philadelphia Phillies | Free agent signing |
| Dec 6, 2005 | Released | Chris Oxspring | San Diego Padres | — | Release |
| Dec 6, 2005 | Signed as free agent | Bret Prinz | — | Colorado Rockies | Free agent signing |
| Dec 6, 2005 | Signed as free agent | Dennis Tankersley | — | St. Louis Cardinals | Free agent signing |
| Dec 6, 2005 | Trade | Steve Kline | Baltimore Orioles | San Francisco Giants | Trade |
| Dec 6, 2005 | Trade | LaTroy Hawkins | San Francisco Giants | Baltimore Orioles | Trade |
| Dec 5, 2005 | Signed as free agent | Deivi Cruz | — | St. Louis Cardinals | Free agent signing |
| Dec 5, 2005 | Signed as free agent | Kyle Farnsworth | — | New York Yankees | Free agent signing |
| Dec 5, 2005 | Signed as free agent | Brian Giles | — | San Diego Padres | Free agent signing |
| Dec 5, 2005 | Trade | Paul Lo Duca | Florida Marlins | New York Mets | Trade |
| Dec 5, 2005 | Trade | Gaby Hernandez | New York Mets | Florida Marlins | Trade |
| Dec 5, 2005 | Trade | Dante Brinkley | New York Mets | Florida Marlins | Trade |
| Dec 4, 2005 | Signed as free agent | Jose Morban | — | Seattle Mariners | Free agent signing |
| Dec 3, 2005 | Signed as free agent | Andy Dominique | — | Seattle Mariners | Free agent signing |
| Dec 2, 2005 | Signed as free agent | Gary Bennett | — | St. Louis Cardinals | Free agent signing |
| Dec 2, 2005 | Signed as free agent | Hector Carrasco | — | Los Angeles Angels of Anaheim | Free agent signing |
| Dec 2, 2005 | Signed | Fautino De Los Santos | — | Chicago White Sox | Amateur free agent signing |
| Dec 2, 2005 | Signed as free agent | Brian Gordon | — | Houston Astros | Free agent signing |
| Dec 2, 2005 | Signed as free agent | Bob Howry | — | Chicago Cubs | Free agent signing |
| Dec 2, 2005 | Released | Pedro Liriano | Philadelphia Phillies | — | Release |
| Dec 2, 2005 | Released | Jose Macias | Chicago Cubs | — | Release |
| Dec 2, 2005 | Signed as free agent | Russ Springer | — | Houston Astros | Free agent signing |
| Dec 2, 2005 | Signed as free agent | Andy Van Hekken | — | Florida Marlins | Free agent signing |
| Dec 2, 2005 | Signed as free agent | Tim Worrell | — | San Francisco Giants | Free agent signing |
| Dec 2, 2005 | Trade | Luis Castillo | Florida Marlins | Minnesota Twins | Trade |
| Dec 2, 2005 | Trade | Travis Bowyer | Minnesota Twins | Florida Marlins | Trade |
| Dec 2, 2005 | Trade | Scott Tyler | Minnesota Twins | Florida Marlins | Trade |
| Dec 2, 2005 | Trade | Chad Gaudin | Toronto Blue Jays | Oakland Athletics | Trade |
| Dec 1, 2005 | Signed as free agent | Brent Abernathy | — | Milwaukee Brewers | Free agent signing |
| Dec 1, 2005 | Released | Sean Douglass | Cleveland Indians | — | Release |
| Dec 1, 2005 | Signed as free agent | Sal Fasano | — | Philadelphia Phillies | Free agent signing |
| Dec 1, 2005 | Signed as free agent | Jason Kershner | — | Milwaukee Brewers | Free agent signing |
| Dec 1, 2005 | Signed as free agent | Kelly Stinnett | — | New York Yankees | Free agent signing |
| Dec 1, 2005 | Signed as free agent | Scott Rice | — | Baltimore Orioles | Free agent signing |
| Nov 30, 2005 | Signed as free agent | Paul Konerko | — | Chicago White Sox | Free agent signing |
| Nov 30, 2005 | Signed as free agent | Abraham Nunez | — | Philadelphia Phillies | Free agent signing |
| Nov 30, 2005 | Signed as free agent | Julio Santana | — | Philadelphia Phillies | Free agent signing |
| Nov 29, 2005 | Signed as free agent | Scott Eyre | — | Chicago Cubs | Free agent signing |
| Nov 29, 2005 | Signed as free agent | Esteban Loaiza | — | Oakland Athletics | Free agent signing |
| Nov 29, 2005 | Signed as free agent | Saul Rivera | — | Washington Nationals | Free agent signing |
| Nov 29, 2005 | Signed as free agent | B. J. Ryan | — | Toronto Blue Jays | Free agent signing |
| Nov 29, 2005 | Signed as free agent | Billy Wagner | — | New York Mets | Free agent signing |
| Nov 28, 2005 | Signed as free agent | Rick Helling | — | Milwaukee Brewers | Free agent signing |
| Nov 28, 2005 | Released | Mark Malaska | Boston Red Sox | — | Release |
| Nov 27, 2005 | Signed as free agent | Dusty Bergman | — | New York Yankees | Free agent signing |
| Nov 26, 2005 | Signed | Wily Peralta | — | Milwaukee Brewers | Amateur free agent signing |
| Nov 25, 2005 | Signed as free agent | Fernando Tatis | — | Baltimore Orioles | Free agent signing |
| Nov 25, 2005 | Trade | Unnamed | Philadelphia Phillies | Chicago White Sox | $ |
| Nov 25, 2005 | Trade | Jim Thome | Philadelphia Phillies | Chicago White Sox | Trade |
| Nov 25, 2005 | Trade | Aaron Rowand | Chicago White Sox | Philadelphia Phillies | Trade |
| Nov 25, 2005 | Trade | Daniel Haigwood | Chicago White Sox | Philadelphia Phillies | Trade |
| Nov 24, 2005 | Signed as free agent | Chad Bentz | — | Chicago White Sox | Free agent signing |
| Nov 24, 2005 | Signed as free agent | Aaron Myette | — | Philadelphia Phillies | Free agent signing |
| Nov 24, 2005 | Trade | Unnamed | Florida Marlins | New York Mets | $ |
| Nov 24, 2005 | Trade | Carlos Delgado | Florida Marlins | New York Mets | Trade |
| Nov 24, 2005 | Trade | Mike Jacobs | New York Mets | Florida Marlins | Trade |
| Nov 24, 2005 | Trade | Yusmeiro Petit | New York Mets | Florida Marlins | Trade |
| Nov 24, 2005 | Trade | Grant Psomas | New York Mets | Florida Marlins | Trade |
| Nov 24, 2005 | Trade | Josh Beckett | Florida Marlins | Boston Red Sox | Trade |
| Nov 24, 2005 | Trade | Mike Lowell | Florida Marlins | Boston Red Sox | Trade |
| Nov 24, 2005 | Trade | Guillermo Mota | Florida Marlins | Boston Red Sox | Trade |
| Nov 24, 2005 | Trade | Hanley Ramirez | Boston Red Sox | Florida Marlins | Trade |
| Nov 24, 2005 | Trade | Anibal Sanchez | Boston Red Sox | Florida Marlins | Trade |
| Nov 24, 2005 | Trade | Harvey Garcia | Boston Red Sox | Florida Marlins | Trade |
| Nov 24, 2005 | Trade | Jesus Delgado | Boston Red Sox | Florida Marlins | Trade |
| Nov 24, 2005 | Signed | Miguel Rojas | — | Cincinnati Reds | Amateur free agent signing |
| Nov 23, 2005 | Signed | Marwin Gonzalez | — | Chicago Cubs | Amateur free agent signing |
| Nov 23, 2005 | Signed as free agent | Mike Smith | — | Minnesota Twins | Free agent signing |
| Nov 23, 2005 | Signed as free agent | Brad Voyles | — | St. Louis Cardinals | Free agent signing |
| Nov 23, 2005 | Signed as free agent | Glenn Williams | — | Minnesota Twins | Free agent signing |
| Nov 22, 2005 | Signed as free agent | Alfredo Amezaga | — | Florida Marlins | Free agent signing |
| Nov 22, 2005 | Signed as free agent | Seth Etherton | — | Kansas City Royals | Free agent signing |
| Nov 22, 2005 | Signed as free agent | Chad Paronto | — | Atlanta Braves | Free agent signing |
| Nov 22, 2005 | Signed as free agent | Bobby Seay | — | Detroit Tigers | Free agent signing |
| Nov 22, 2005 | Signed as free agent | Eric Young | — | San Diego Padres | Free agent signing |
| Nov 21, 2005 | Signed as free agent | Marlon Anderson | — | Washington Nationals | Free agent signing |
| Nov 21, 2005 | Released | Joe Beimel | Tampa Bay Devil Rays | — | Release |
| Nov 21, 2005 | Signed as free agent | Adam Bernero | — | Kansas City Royals | Free agent signing |
| Nov 21, 2005 | Signed as free agent | Jeff Cirillo | — | Milwaukee Brewers | Free agent signing |
| Nov 21, 2005 | Signed as free agent | Brandon Harper | — | Washington Nationals | Free agent signing |
| Nov 21, 2005 | Signed as free agent | Chad Harville | — | Tampa Bay Devil Rays | Free agent signing |
| Nov 21, 2005 | Signed as free agent | Kenji Johjima | — | Seattle Mariners | Free agent signing with first major-league team |
| Nov 21, 2005 | Trade | Bobby Hill | Pittsburgh Pirates | San Diego Padres | Trade |
| Nov 20, 2005 | Signed as free agent | Jesus Feliciano | — | Washington Nationals | Free agent signing |
| Nov 20, 2005 | Signed as free agent | Scott Strickland | — | Pittsburgh Pirates | Free agent signing |
| Nov 18, 2005 | Signed as free agent | Juan Brito | — | Arizona Diamondbacks | Free agent signing |
| Nov 18, 2005 | Signed as free agent | Jesse Carlson | — | Texas Rangers | Free agent signing |
| Nov 18, 2005 | Released | Adam Greenberg | Chicago Cubs | — | Release |
| Nov 18, 2005 | Released | Gabe Kapler | Boston Red Sox | — | Release |
| Nov 18, 2005 | Released | Ben Kozlowski | Cincinnati Reds | — | Release |
| Nov 18, 2005 | Released | Norihiro Nakamura | Los Angeles Dodgers | — | Release |
| Nov 18, 2005 | Signed as free agent | Ramon Nivar | — | St. Louis Cardinals | Free agent signing |
| Nov 18, 2005 | Released | Michael Restovich | Pittsburgh Pirates | — | Release |
| Nov 18, 2005 | Released | Ramon Santiago | Seattle Mariners | — | Release |
| Nov 18, 2005 | Signed as free agent | Victor Santos | — | Kansas City Royals | Free agent signing |
| Nov 18, 2005 | Trade | Mike Cameron | New York Mets | San Diego Padres | Trade |
| Nov 18, 2005 | Trade | Xavier Nady | San Diego Padres | New York Mets | Trade |
| Nov 17, 2005 | Released | Kevin Appier | Kansas City Royals | — | Release |
| Nov 17, 2005 | Released | Gary Glover | Milwaukee Brewers | — | Release |
| Nov 17, 2005 | Released | Ricky Stone | St. Louis Cardinals | — | Release |
| Nov 16, 2005 | Signed as free agent | Geoff Blum | — | San Diego Padres | Free agent signing |
| Nov 16, 2005 | Signed as free agent | Adrian Brown | — | Texas Rangers | Free agent signing |
| Nov 16, 2005 | Signed as free agent | Anderson Machado | — | Cincinnati Reds | Free agent signing |
| Nov 16, 2005 | Signed | Luis Marte | — | Detroit Tigers | Amateur free agent signing |
| Nov 16, 2005 | Signed as free agent | Tommy Phelps | — | Cincinnati Reds | Free agent signing |
| Nov 16, 2005 | Signed as free agent | Chris Richard | — | Kansas City Royals | Free agent signing |
| Nov 16, 2005 | Trade | Jon Leicester | Chicago Cubs | Texas Rangers | Trade |
| Nov 16, 2005 | Trade | Clint Brannon | Texas Rangers | Chicago Cubs | Trade |
| Nov 16, 2005 | Trade | Ron Villone | Florida Marlins | New York Yankees | Trade |
| Nov 16, 2005 | Trade | Ben Julianel | New York Yankees | Florida Marlins | Trade |
| Nov 15, 2005 | Signed as free agent | Chris Coste | — | Philadelphia Phillies | Free agent signing |
| Nov 15, 2005 | Signed as free agent | Mike Hessman | — | Detroit Tigers | Free agent signing |
| Nov 15, 2005 | Signed as free agent | Russ Johnson | — | New York Yankees | Free agent signing |
| Nov 15, 2005 | Signed as free agent | Joe Nelson | — | Kansas City Royals | Free agent signing |
| Nov 15, 2005 | Signed as free agent | Britt Reames | — | Pittsburgh Pirates | Free agent signing |
| Nov 15, 2005 | Signed as free agent | Matt Roney | — | Oakland Athletics | Free agent signing |
| Nov 14, 2005 | Signed as free agent | Chad Durbin | — | Detroit Tigers | Free agent signing |
| Nov 14, 2005 | Signed as free agent | Luis Figueroa | — | Toronto Blue Jays | Free agent signing |
| Nov 14, 2005 | Signed as free agent | Alexis Gomez | — | Detroit Tigers | Free agent signing |
| Nov 14, 2005 | Signed as free agent | David Kelton | — | Atlanta Braves | Free agent signing |
| Nov 14, 2005 | Signed as free agent | Neifi Perez | — | Chicago Cubs | Free agent signing |
| Nov 14, 2005 | Signed as free agent | Kerry Robinson | — | Kansas City Royals | Free agent signing |
| Nov 11, 2005 | Signed as free agent | Luke Allen | — | Boston Red Sox | Free agent signing |
| Nov 11, 2005 | Signed as free agent | Chris George | — | Florida Marlins | Free agent signing |
| Nov 11, 2005 | Signed as free agent | Mark Little | — | Florida Marlins | Free agent signing |
| Nov 11, 2005 | Signed as free agent | Steve Torrealba | — | Cincinnati Reds | Free agent signing |
| Nov 10, 2005 | Signed as free agent | Rick Bauer | — | Texas Rangers | Free agent signing |
| Nov 10, 2005 | Signed as free agent | Brian Dallimore | — | Milwaukee Brewers | Free agent signing |
| Nov 10, 2005 | Signed as free agent | Brian Falkenborg | — | St. Louis Cardinals | Free agent signing |
| Nov 10, 2005 | Released | Charles Gipson | Houston Astros | — | Release |
| Nov 10, 2005 | Signed as free agent | Eric Junge | — | San Diego Padres | Free agent signing |
| Nov 10, 2005 | Signed as free agent | Jason Roach | — | Pittsburgh Pirates | Free agent signing |
| Nov 10, 2005 | Signed as free agent | Jake Robbins | — | Cincinnati Reds | Free agent signing |
| Nov 10, 2005 | Signed as free agent | Rich Rundles | — | St. Louis Cardinals | Free agent signing |
| Nov 9, 2005 | Signed as free agent | Manny Alexander | — | San Diego Padres | Free agent signing |
| Nov 9, 2005 | Signed as free agent | Jason Alfaro | — | Pittsburgh Pirates | Free agent signing |
| Nov 9, 2005 | Signed as free agent | Carlos Mendez | — | Atlanta Braves | Free agent signing |
| Nov 9, 2005 | Signed as free agent | Brandon Puffer | — | Houston Astros | Free agent signing |
| Nov 9, 2005 | Signed as free agent | Jay Witasick | — | Oakland Athletics | Free agent signing |
| Nov 8, 2005 | Signed as free agent | Carlos Maldonado | — | Pittsburgh Pirates | Free agent signing |
| Nov 8, 2005 | Signed as free agent | Corky Miller | — | Seattle Mariners | Free agent signing |
| Nov 8, 2005 | Signed as free agent | Prentice Redman | — | St. Louis Cardinals | Free agent signing |
| Nov 7, 2005 | Signed as free agent | Jamie Burke | — | Texas Rangers | Free agent signing |
| Nov 7, 2005 | Signed as free agent | Kevin Hooper | — | Detroit Tigers | Free agent signing |
| Nov 7, 2005 | Signed as free agent | Shane Loux | — | Kansas City Royals | Free agent signing |
| Nov 6, 2005 | Signed as free agent | Kevin Walker | — | Texas Rangers | Free agent signing |
| Nov 4, 2005 | Signed as free agent | Travis Chapman | — | Pittsburgh Pirates | Free agent signing |
| Nov 4, 2005 | Signed as free agent | Adam Hyzdu | — | Texas Rangers | Free agent signing |
| Nov 4, 2005 | Signed as free agent | Chris Widger | — | Chicago White Sox | Free agent signing |
| Nov 4, 2005 | Trade | Unnamed | San Diego Padres | Washington Nationals | $ |
| Nov 4, 2005 | Trade | Brian Lawrence | San Diego Padres | Washington Nationals | Trade |
| Nov 4, 2005 | Trade | Vinny Castilla | Washington Nationals | San Diego Padres | Trade |
| Nov 3, 2005 | Signed as free agent | Mike Coolbaugh | — | Kansas City Royals | Free agent signing |
| Nov 3, 2005 | Signed as free agent | Ruddy Lugo | — | Tampa Bay Devil Rays | Free agent signing |
| Nov 2, 2005 | Signed as free agent | Edwin Bellorin | — | Los Angeles Dodgers | Free agent signing |
| Nov 1, 2005 | Signed as free agent | Brian Cooper | — | San Francisco Giants | Free agent signing |
| Nov 1, 2005 | Signed as free agent | Dave Elder | — | Kansas City Royals | Free agent signing |
| Nov 1, 2005 | Signed as free agent | Jason Smith | — | Colorado Rockies | Free agent signing |
| Nov 1, 2005 | Signed as free agent | Matt Whiteside | — | Pittsburgh Pirates | Free agent signing |
| Nov 2005 | Signed as free agent | Chris Booker | — | Washington Nationals | Free agent signing |
| Oct 29, 2005 | Signed as free agent | Clay Condrey | — | Philadelphia Phillies | Free agent signing |
| Oct 28, 2005 | Signed as free agent | Kevin Barker | — | Toronto Blue Jays | Free agent signing |
| Oct 28, 2005 | Signed as free agent | Juan Perez | — | New York Mets | Free agent signing |
| Oct 28, 2005 | Signed as free agent | John Webb | — | St. Louis Cardinals | Free agent signing |
| Oct 27, 2005 | Signed as free agent | Damian Jackson | — | Washington Nationals | Free agent signing |
| Oct 25, 2005 | Signed | Lester Oliveros | — | Detroit Tigers | Amateur free agent signing |
| Oct 25, 2005 | Signed | Brayan Villarreal | — | Detroit Tigers | Amateur free agent signing |
| Oct 25, 2005 | Signed as free agent | Dewayne Wise | — | Cincinnati Reds | Free agent signing |
| Oct 22, 2005 | Signed as free agent | Adam Johnson | — | Oakland Athletics | Free agent signing |
| Oct 22, 2005 | Signed as free agent | Kris Wilson | — | New York Yankees | Free agent signing |
| Oct 18, 2005 | Released | Willie Collazo | Los Angeles Angels of Anaheim | — | Release |
| Oct 15, 2005 | Released | Ben Howard | Florida Marlins | — | Release |
| Oct 15, 2005 | Signed as free agent | Jason Tyner | — | Minnesota Twins | Free agent signing |
| Oct 14, 2005 | Signed as free agent | Eddie Rogers | — | Baltimore Orioles | Free agent signing |
| Oct 13, 2005 | Released | Manny Alexander | San Diego Padres | — | Release |
| Oct 13, 2005 | Released | Adam Hyzdu | Boston Red Sox | — | Release |
| Oct 11, 2005 | Signed as free agent | Wilson Valdez | — | Kansas City Royals | Free agent signing |
| Oct 7, 2005 | Released | Gary Knotts | Detroit Tigers | — | Release |
| Oct 7, 2005 | Released | Eric Munson | Tampa Bay Devil Rays | — | Release |
| Oct 7, 2005 | Released | Ruben Rivera | New York Yankees | — | Release |
| Oct 6, 2005 | Signed | Dayan Diaz | — | Houston Astros | Amateur free agent signing |
| Oct 4, 2005 | Signed as free agent | Matt Riley | — | Texas Rangers | Free agent signing |
| Oct 3, 2005 | Released | Antonio Osuna | Washington Nationals | — | Release |
| Oct 3, 2005 | Released | John Riedling | Florida Marlins | — | Release |
| Oct 3, 2005 | Released | Tim Spooneybarger | Florida Marlins | — | Release |
| Oct 2, 2005 | Released | John Halama | Washington Nationals | — | Release |
| Oct 2, 2005 | Released | Keith Osik | Washington Nationals | — | Release |
| Sep 29, 2005 | Trade | Mike Stanton | Washington Nationals | Boston Red Sox | Trade |
| Sep 29, 2005 | Trade | Rhys Taylor | Boston Red Sox | Washington Nationals | Trade |
| Sep 29, 2005 | Trade | Yader Peralta | Boston Red Sox | Washington Nationals | Trade |
| Sep 23, 2005 | Signed | Yamaico Navarro | — | Boston Red Sox | Amateur free agent signing |
| Sep 17, 2005 | Signed as free agent | Evan Meek | — | San Diego Padres | Free agent signing |
| Sep 15, 2005 | Released | Matt Perisho | Boston Red Sox | — | Release |
| Sep 14, 2005 | Signed | Jhonatan Solano | — | Washington Nationals | Amateur free agent signing |
| Sep 12, 2005 | Released | Seth Etherton | Oakland Athletics | — | Release |
| Sep 12, 2005 | Released | Alex Graman | Cincinnati Reds | — | Release |
| Sep 12, 2005 | Signed as free agent | Mike Mordecai | — | Florida Marlins | Free agent signing |
| Sep 9, 2005 | Released | Adam Bernero | Atlanta Braves | — | Release |
| Sep 9, 2005 | Signed | Alex Liddi | — | Seattle Mariners | Amateur free agent signing |
| Sep 9, 2005 | Signed as free agent | Paul Quantrill | — | Florida Marlins | Free agent signing |
| Sep 7, 2005 | Released | Nate Teut | Chicago Cubs | — | Release |
| Sep 6, 2005 | Released | Armando Almanza | St. Louis Cardinals | — | Release |
| Sep 6, 2005 | Released | Matt Beech | Detroit Tigers | — | Release |
| Sep 6, 2005 | Released | Jose Herrera | Baltimore Orioles | — | Release |
| Sep 6, 2005 | Released | Calvin Pickering | Kansas City Royals | — | Release |
| Sep 6, 2005 | Released | Bill Pulsipher | St. Louis Cardinals | — | Release |
| Sep 6, 2005 | Released | Ben Weber | Cincinnati Reds | — | Release |
| Sep 6, 2005 | Signed | Juan Graterol | — | Kansas City Royals | Amateur free agent signing |
| Sep 2, 2005 | Released | Troy Cate | Seattle Mariners | — | Release |
| Sep 2, 2005 | Released | Kevin Jarvis | St. Louis Cardinals | — | Release |
| Sep 2, 2005 | Signed as free agent | Nate Teut | — | Chicago Cubs | Free agent signing |
| Sep 1, 2005 | Released | Ron Calloway | New York Mets | — | Release |
| Sep 1, 2005 | Released | Sidney Ponson | Baltimore Orioles | — | Release |
| Sep 1, 2005 | Released | Bret Prinz | Los Angeles Angels of Anaheim | — | Release |
| Sep 1, 2005 | Released | Kerry Robinson | Atlanta Braves | — | Release |
| Aug 31, 2005 | Released | Rich Garces | Boston Red Sox | — | Release |
| Aug 31, 2005 | Released | Paul Quantrill | San Diego Padres | — | Release |
| Aug 31, 2005 | Trade | Juan Jimenez | San Diego Padres | Texas Rangers | Trade |
| Aug 31, 2005 | Trade | Manny Alexander | Texas Rangers | San Diego Padres | Trade |
| Aug 30, 2005 | Released | Winston Abreu | Arizona Diamondbacks | — | Release |
| Aug 30, 2005 | Signed as free agent | Mark Bellhorn | — | New York Yankees | Free agent signing |
| Aug 30, 2005 | Released | Wilson Valdez | San Diego Padres | — | Release |
| Aug 30, 2005 | Trade | Deivi Cruz | San Francisco Giants | Washington Nationals | Trade |
| Aug 30, 2005 | Trade | Ben Cox | Washington Nationals | San Francisco Giants | Trade |
| Aug 30, 2005 | Trade | Jason Christiansen | San Francisco Giants | Los Angeles Angels of Anaheim | Trade |
| Aug 30, 2005 | Trade | Dusty Bergman | Los Angeles Angels of Anaheim | San Francisco Giants | Trade |
| Aug 30, 2005 | Trade | Ronnie Ray | Los Angeles Angels of Anaheim | San Francisco Giants | Trade |
| Aug 29, 2005 | Trade | Todd Blackford | Atlanta Braves | Chicago Cubs | Trade |
| Aug 29, 2005 | Trade | Angelo Burrows | Atlanta Braves | Chicago Cubs | Trade |
| Aug 29, 2005 | Trade | Todd Hollandsworth | Chicago Cubs | Atlanta Braves | Trade |
| Aug 28, 2005 | Released | Mike Remlinger | Boston Red Sox | — | Release |
| Aug 28, 2005 | Released | Mel Stocker | Kansas City Royals | — | Release |
| Aug 27, 2005 | Released | Frank Castillo | Florida Marlins | — | Release |
| Aug 27, 2005 | Released | Kevin Orie | Washington Nationals | — | Release |
| Aug 27, 2005 | Signed as free agent | Shawn Sedlacek | — | Baltimore Orioles | Free agent signing |
| Aug 27, 2005 | Trade | Michael Tucker | San Francisco Giants | Philadelphia Phillies | Trade |
| Aug 27, 2005 | Trade | Kelvin Pichardo | Philadelphia Phillies | San Francisco Giants | Trade |
| Aug 27, 2005 | Trade | Justin Berg | New York Yankees | Chicago Cubs | Trade |
| Aug 27, 2005 | Trade | Matt Lawton | Chicago Cubs | New York Yankees | Trade |
| Aug 25, 2005 | Released | Ricky Bottalico | Boston Red Sox | — | Release |
| Aug 25, 2005 | Signed as free agent | Alberto Castillo | — | Oakland Athletics | Free agent signing |
| Aug 25, 2005 | Signed as free agent | Jason Pearson | — | Baltimore Orioles | Free agent signing |
| Aug 24, 2005 | Signed as free agent | Eddie Oropesa | — | Baltimore Orioles | Free agent signing |
| Aug 23, 2005 | Released | Danny Graves | New York Mets | — | Release |
| Aug 23, 2005 | Signed as free agent | Ruben Rivera | — | New York Yankees | Free agent signing |
| Aug 22, 2005 | Signed | Luis Avilan | — | Atlanta Braves | Amateur free agent signing |
| Aug 22, 2005 | Released | Grant Roberts | New York Yankees | — | Release |
| Aug 22, 2005 | Signed | Luis Jimenez | — | Los Angeles Angels of Anaheim | Amateur free agent signing |
| Aug 19, 2005 | Released | Mark Bellhorn | Boston Red Sox | — | Release |
| Aug 19, 2005 | Signed as free agent | Vladimir Nunez | — | Pittsburgh Pirates | Free agent signing |
| Aug 19, 2005 | Released | Scott Spiezio | Seattle Mariners | — | Release |
| Aug 18, 2005 | Signed as free agent | David Lee | — | St. Louis Cardinals | Free agent signing |
| Aug 17, 2005 | Released | Vladimir Nunez | Arizona Diamondbacks | — | Release |
| Aug 16, 2005 | Signed as free agent | Jimmy Anderson | — | Houston Astros | Free agent signing |
| Aug 16, 2005 | Signed | Jerad Head | — | Cleveland Indians | Amateur free agent signing |
| Aug 15, 2005 | Signed as free agent | Jeff Duncan | — | San Diego Padres | Free agent signing |
| Aug 15, 2005 | Released | Aaron Sele | Texas Rangers | — | Release |
| Aug 15, 2005 | Released | Luis Ugueto | Kansas City Royals | — | Release |
| Aug 14, 2005 | Signed | Frank Herrmann | — | Cleveland Indians | Amateur free agent signing |
| Aug 14, 2005 | Released | Jason Pearson | Boston Red Sox | — | Release |
| Aug 14, 2005 | Released | Kirk Rueter | San Francisco Giants | — | Release |
| Aug 13, 2005 | Released | Valerio De Los Santos | Florida Marlins | — | Release |
| Aug 13, 2005 | Signed as free agent | Desi Relaford | — | Toronto Blue Jays | Free agent signing |
| Aug 13, 2005 | Signed | James Beresford | — | Minnesota Twins | Amateur free agent signing |
| Aug 12, 2005 | Released | Jimmy Anderson | Tampa Bay Devil Rays | — | Release |
| Aug 12, 2005 | Released | Pedro Borbon | Los Angeles Angels of Anaheim | — | Release |
| Aug 12, 2005 | Signed as free agent | Shingo Takatsu | — | New York Mets | Free agent signing |
| Aug 11, 2005 | Signed as free agent | Chad Allen | — | St. Louis Cardinals | Free agent signing |
| Aug 11, 2005 | Signed as free agent | Jim Bullinger | — | Chicago White Sox | Free agent signing |
| Aug 11, 2005 | Released | Midre Cummings | Baltimore Orioles | — | Release |
| Aug 11, 2005 | Released | Jeff Duncan | New York Mets | — | Release |
| Aug 11, 2005 | Released | Hector Ortiz | Washington Nationals | — | Release |
| Aug 11, 2005 | Signed as free agent | Keith Osik | — | Washington Nationals | Free agent signing |
| Aug 10, 2005 | Signed as free agent | Alex Graman | — | Cincinnati Reds | Free agent signing |
| Aug 10, 2005 | Signed as free agent | Gabe Molina | — | Colorado Rockies | Free agent signing |
| Aug 10, 2005 | Signed as free agent | Brady Raggio | — | Philadelphia Phillies | Free agent signing |
| Aug 10, 2005 | Released | Chad Zerbe | Cleveland Indians | — | Release |
| Aug 9, 2005 | Signed as free agent | Matt Beech | — | Detroit Tigers | Free agent signing |
| Aug 9, 2005 | Signed as free agent | Ricky Bottalico | — | Boston Red Sox | Free agent signing |
| Aug 9, 2005 | Released | David Lee | San Francisco Giants | — | Release |
| Aug 9, 2005 | Trade | Unnamed | Chicago Cubs | Boston Red Sox | $ |
| Aug 9, 2005 | Trade | Mike Remlinger | Chicago Cubs | Boston Red Sox | Trade |
| Aug 9, 2005 | Trade | Olivo Astacio | Boston Red Sox | Chicago Cubs | Trade |
| Aug 8, 2005 | Signed as free agent | Dave Elder | — | Kansas City Royals | Free agent signing |
| Aug 8, 2005 | Signed | Francisco Peguero | — | San Francisco Giants | Amateur free agent signing |
| Aug 7, 2005 | Signed as free agent | Brian Falkenborg | — | St. Louis Cardinals | Free agent signing |
| Aug 7, 2005 | Signed as free agent | Aaron Sele | — | Texas Rangers | Free agent signing |
| Aug 6, 2005 | Released | Chad Allen | Texas Rangers | — | Release |
| Aug 6, 2005 | Signed as free agent | Jose Leon | — | Cincinnati Reds | Free agent signing |
| Aug 6, 2005 | Signed as free agent | Matt Perisho | — | Boston Red Sox | Free agent signing |
| Aug 5, 2005 | Released | Alberto Castillo | Kansas City Royals | — | Release |
| Aug 5, 2005 | Signed as free agent | Matt Erickson | — | Florida Marlins | Free agent signing |
| Aug 5, 2005 | Signed as free agent | John Halama | — | Washington Nationals | Free agent signing |
| Aug 4, 2005 | Signed as free agent | Armando Almanza | — | St. Louis Cardinals | Free agent signing |
| Aug 4, 2005 | Signed as free agent | Eric Crozier | — | Cincinnati Reds | Free agent signing |
| Aug 3, 2005 | Released | Wilton Guerrero | Chicago White Sox | — | Release |
| Aug 3, 2005 | Released | Santiago Perez | Cincinnati Reds | — | Release |
| Aug 2, 2005 | Released | Brian Falkenborg | San Diego Padres | — | Release |
| Aug 2, 2005 | Released | Marquis Grissom | San Francisco Giants | — | Release |
| Aug 2, 2005 | Signed as free agent | Jason Romano | — | Florida Marlins | Free agent signing |
| Aug 1, 2005 | Signed as free agent | Brian Buchanan | — | Minnesota Twins | Free agent signing |
| Aug 1, 2005 | Signed as free agent | David Doster | — | Arizona Diamondbacks | Free agent signing |
| Aug 1, 2005 | Signed as free agent | Jared Fernandez | — | Philadelphia Phillies | Free agent signing |
| Aug 1, 2005 | Released | Jose Leon | Pittsburgh Pirates | — | Release |
| Aug 1, 2005 | Released | Shingo Takatsu | Chicago White Sox | — | Release |
| Jul 31, 2005 | Released | Bret Boone | Minnesota Twins | — | Release |
| Jul 31, 2005 | Signed as free agent | Joe Nelson | — | St. Louis Cardinals | Free agent signing |
| Jul 31, 2005 | Released | Matt Perisho | Florida Marlins | — | Release |
| Jul 31, 2005 | Released | Desi Relaford | Colorado Rockies | — | Release |
| Jul 31, 2005 | Released | Aaron Sele | Seattle Mariners | — | Release |
| Jul 31, 2005 | Trade | Ron Villone | Seattle Mariners | Florida Marlins | Trade |
| Jul 31, 2005 | Trade | Yorman Bazardo | Florida Marlins | Seattle Mariners | Trade |
| Jul 31, 2005 | Trade | Mike Flannery | Florida Marlins | Seattle Mariners | Trade |
| Jul 31, 2005 | Trade | Unnamed | Chicago Cubs | Pittsburgh Pirates | $ |
| Jul 31, 2005 | Trade | Jody Gerut | Chicago Cubs | Pittsburgh Pirates | Trade |
| Jul 31, 2005 | Trade | Matt Lawton | Pittsburgh Pirates | Chicago Cubs | Trade |
| Jul 31, 2005 | Trade | Kyle Farnsworth | Detroit Tigers | Atlanta Braves | Trade |
| Jul 31, 2005 | Trade | Roman Colon | Atlanta Braves | Detroit Tigers | Trade |
| Jul 31, 2005 | Trade | Zach Miner | Atlanta Braves | Detroit Tigers | Trade |
| Jul 31, 2005 | Trade | Ryan Meaux | Chicago White Sox | San Diego Padres | Trade |
| Jul 31, 2005 | Trade | Geoff Blum | San Diego Padres | Chicago White Sox | Trade |
| Jul 31, 2005 | Trade | Miguel Olivo | Seattle Mariners | San Diego Padres | Trade |
| Jul 31, 2005 | Trade | Miguel Ojeda | San Diego Padres | Seattle Mariners | Trade |
| Jul 31, 2005 | Trade | Natanael Mateo | San Diego Padres | Seattle Mariners | Trade |
| Jul 30, 2005 | Released | Brian Boehringer | New York Yankees | — | Release |
| Jul 30, 2005 | Signed as free agent | Alan Embree | — | New York Yankees | Free agent signing |
| Jul 30, 2005 | Trade | Unnamed | Texas Rangers | San Diego Padres | $ |
| Jul 30, 2005 | Trade | Chan Ho Park | Texas Rangers | San Diego Padres | Trade |
| Jul 30, 2005 | Trade | Phil Nevin | San Diego Padres | Texas Rangers | Trade |
| Jul 30, 2005 | Trade | Randy Winn | Seattle Mariners | San Francisco Giants | Trade |
| Jul 30, 2005 | Trade | Yorvit Torrealba | San Francisco Giants | Seattle Mariners | Trade |
| Jul 30, 2005 | Trade | Jesse Foppert | San Francisco Giants | Seattle Mariners | Trade |
| Jul 30, 2005 | Trade | Larry Bigbie | Baltimore Orioles | Colorado Rockies | Trade |
| Jul 30, 2005 | Trade | Eric Byrnes | Colorado Rockies | Baltimore Orioles | Trade |
| Jul 30, 2005 | Trade | Unnamed | Arizona Diamondbacks | Boston Red Sox | $ |
| Jul 30, 2005 | Trade | Jose Cruz | Arizona Diamondbacks | Boston Red Sox | Trade |
| Jul 30, 2005 | Trade | Kenny Perez | Boston Red Sox | Arizona Diamondbacks | Trade |
| Jul 30, 2005 | Trade | Kyle Bono | Boston Red Sox | Arizona Diamondbacks | Trade |
| Jul 29, 2005 | Signed as free agent | Alan Benes | — | St. Louis Cardinals | Free agent signing |
| Jul 29, 2005 | Released | Pat Borders | Seattle Mariners | — | Release |
| Jul 29, 2005 | Released | Scott Erickson | Los Angeles Dodgers | — | Release |
| Jul 29, 2005 | Released | Alex Graman | New York Yankees | — | Release |
| Jul 29, 2005 | Signed as free agent | John Lindsey | — | Florida Marlins | Free agent signing |
| Jul 29, 2005 | Signed as free agent | Hideo Nomo | — | New York Yankees | Free agent signing |
| Jul 28, 2005 | Trade | J. J. Furmaniak | San Diego Padres | Pittsburgh Pirates | Trade |
| Jul 28, 2005 | Trade | David Ross | Pittsburgh Pirates | San Diego Padres | Trade |
| Jul 28, 2005 | Trade | Shawn Chacon | Colorado Rockies | New York Yankees | Trade |
| Jul 28, 2005 | Trade | Ramon Ramirez | New York Yankees | Colorado Rockies | Trade |
| Jul 28, 2005 | Trade | Eduardo Sierra | New York Yankees | Colorado Rockies | Trade |
| Jul 27, 2005 | Released | Ricky Bottalico | Milwaukee Brewers | — | Release |
| Jul 27, 2005 | Signed as free agent | Wil Cordero | — | New York Mets | Free agent signing |
| Jul 27, 2005 | Released | Enrique Wilson | Chicago Cubs | — | Release |
| Jul 26, 2005 | Released | John Halama | Boston Red Sox | — | Release |
| Jul 26, 2005 | Signed as free agent | Ryan Snare | — | San Diego Padres | Free agent signing |
| Jul 26, 2005 | Signed as free agent | Reggie Taylor | — | St. Louis Cardinals | Free agent signing |
| Jul 25, 2005 | Signed as free agent | Anthony Ferrari | — | Washington Nationals | Free agent signing |
| Jul 25, 2005 | Released | David Manning | Baltimore Orioles | — | Release |
| Jul 25, 2005 | Released | Joe Nelson | Tampa Bay Devil Rays | — | Release |
| Jul 25, 2005 | Signed as free agent | Colin Porter | — | Arizona Diamondbacks | Free agent signing |
| Jul 25, 2005 | Released | Scott Stewart | San Diego Padres | — | Release |
| Jul 25, 2005 | Signed | Yoervis Medina | — | Seattle Mariners | Amateur free agent signing |
| Jul 24, 2005 | Released | Chris Mears | St. Louis Cardinals | — | Release |
| Jul 23, 2005 | Signed | Hunter Jones | — | Boston Red Sox | Amateur free agent signing |
| Jul 23, 2005 | Released | Damian Rolls | New York Yankees | — | Release |
| Jul 23, 2005 | Trade | Joe Randa | Cincinnati Reds | San Diego Padres | Trade |
| Jul 23, 2005 | Trade | Justin Germano | San Diego Padres | Cincinnati Reds | Trade |
| Jul 23, 2005 | Trade | Travis Chick | San Diego Padres | Cincinnati Reds | Trade |
| Jul 22, 2005 | Released | Armando Almanza | Arizona Diamondbacks | — | Release |
| Jul 22, 2005 | Released | Doug Creek | Detroit Tigers | — | Release |
| Jul 22, 2005 | Released | Gene Kingsale | Baltimore Orioles | — | Release |
| Jul 22, 2005 | Released | Fernando Lunar | New York Mets | — | Release |
| Jul 22, 2005 | Released | Colin Porter | New York Yankees | — | Release |
| Jul 22, 2005 | Signed as free agent | Jason Roach | — | Pittsburgh Pirates | Free agent signing |
| Jul 22, 2005 | Signed as free agent | Kevin Tolar | — | Toronto Blue Jays | Free agent signing |
| Jul 21, 2005 | Released | Brian Buchanan | Colorado Rockies | — | Release |
| Jul 21, 2005 | Trade | Kevin Gryboski | Atlanta Braves | Texas Rangers | Trade |
| Jul 21, 2005 | Trade | Matt Lorenzo | Texas Rangers | Atlanta Braves | Trade |
| Jul 21, 2005 | Trade | Unnamed | Philadelphia Phillies | Arizona Diamondbacks | $ |
| Jul 21, 2005 | Trade | Tim Worrell | Philadelphia Phillies | Arizona Diamondbacks | Trade |
| Jul 21, 2005 | Trade | Matt Kata | Arizona Diamondbacks | Philadelphia Phillies | Trade |
| Jul 20, 2005 | Released | Wil Cordero | Washington Nationals | — | Release |
| Jul 20, 2005 | Released | Anthony Ferrari | St. Louis Cardinals | — | Release |
| Jul 20, 2005 | Signed as free agent | Trent Hubbard | — | Tampa Bay Devil Rays | Free agent signing |
| Jul 20, 2005 | Released | Jason Roach | Tampa Bay Devil Rays | — | Release |
| Jul 20, 2005 | Released | Ryan Snare | Texas Rangers | — | Release |
| Jul 20, 2005 | Released | Reggie Taylor | Tampa Bay Devil Rays | — | Release |
| Jul 20, 2005 | Released | Eduardo Villacis | Chicago White Sox | — | Release |
| Jul 19, 2005 | Released | Alan Embree | Boston Red Sox | — | Release |
| Jul 19, 2005 | Released | Matt Ford | Kansas City Royals | — | Release |
| Jul 19, 2005 | Signed | Henry Villar | — | Houston Astros | Amateur free agent signing |
| Jul 19, 2005 | Trade | Scott Cassidy | Boston Red Sox | San Diego Padres | Trade |
| Jul 19, 2005 | Trade | Adam Hyzdu | San Diego Padres | Boston Red Sox | Trade |
| Jul 19, 2005 | Trade | Tony Graffanino | Kansas City Royals | Boston Red Sox | Trade |
| Jul 19, 2005 | Trade | Chip Ambres | Boston Red Sox | Kansas City Royals | Trade |
| Jul 19, 2005 | Trade | Juan Cedeno | Boston Red Sox | Kansas City Royals | Trade |
| Jul 18, 2005 | Released | Mike Porzio | Atlanta Braves | — | Release |
| Jul 18, 2005 | Released | Benito Santiago | New York Mets | — | Release |
| Jul 18, 2005 | Released | Marc Valdes | New York Yankees | — | Release |
| Jul 18, 2005 | Trade | Jason Dubois | Chicago Cubs | Cleveland Indians | Trade |
| Jul 18, 2005 | Trade | Jody Gerut | Cleveland Indians | Chicago Cubs | Trade |
| Jul 17, 2005 | Released | Dennys Reyes | San Diego Padres | — | Release |
| Jul 17, 2005 | Released | Steve Smyth | Oakland Athletics | — | Release |
| Jul 16, 2005 | Released | Hideo Nomo | Tampa Bay Devil Rays | — | Release |
| Jul 16, 2005 | Released | Steve Sparks | Oakland Athletics | — | Release |
| Jul 15, 2005 | Signed as free agent | Gabe Kapler | — | Boston Red Sox | Free agent signing |
| Jul 15, 2005 | Signed as free agent | Brian Tollberg | — | Houston Astros | Free agent signing |
| Jul 14, 2005 | Signed as free agent | Joe Borowski | — | Tampa Bay Devil Rays | Free agent signing |
| Jul 14, 2005 | Released | Eric Crozier | New York Yankees | — | Release |
| Jul 14, 2005 | Released | Al Levine | Florida Marlins | — | Release |
| Jul 14, 2005 | Released | Steve Reed | Baltimore Orioles | — | Release |
| Jul 14, 2005 | Signed as free agent | Chuck Smith | — | Baltimore Orioles | Free agent signing |
| Jul 14, 2005 | Signed as free agent | Ricky Stone | — | St. Louis Cardinals | Free agent signing |
| Jul 13, 2005 | Signed as free agent | Rob Bell | — | Tampa Bay Devil Rays | Free agent signing |
| Jul 13, 2005 | Signed as free agent | Mike Stanton | — | Washington Nationals | Free agent signing |
| Jul 13, 2005 | Trade | Unnamed | Washington Nationals | Colorado Rockies | $ |
| Jul 13, 2005 | Trade | Zach Day | Washington Nationals | Colorado Rockies | Trade |
| Jul 13, 2005 | Trade | J. J. Davis | Washington Nationals | Colorado Rockies | Trade |
| Jul 13, 2005 | Trade | Preston Wilson | Colorado Rockies | Washington Nationals | Trade |
| Jul 13, 2005 | Trade | Unnamed | Boston Red Sox | Oakland Athletics | $ |
| Jul 13, 2005 | Trade | Jay Payton | Boston Red Sox | Oakland Athletics | Trade |
| Jul 13, 2005 | Trade | Chad Bradford | Oakland Athletics | Boston Red Sox | Trade |
| Jul 13, 2005 | Trade | Joe Kennedy | Colorado Rockies | Oakland Athletics | Trade |
| Jul 13, 2005 | Trade | Jay Witasick | Colorado Rockies | Oakland Athletics | Trade |
| Jul 13, 2005 | Trade | Eric Byrnes | Oakland Athletics | Colorado Rockies | Trade |
| Jul 13, 2005 | Trade | Omar Quintanilla | Oakland Athletics | Colorado Rockies | Trade |
| Jul 11, 2005 | Signed as free agent | Kevin Frederick | — | Boston Red Sox | Free agent signing |
| Jul 11, 2005 | Released | Chris Fussell | Houston Astros | — | Release |
| Jul 11, 2005 | Signed as free agent | Steve Kent | — | Atlanta Braves | Free agent signing |
| Jul 11, 2005 | Signed | Fernando Martinez | — | New York Mets | Amateur free agent signing |
| Jul 11, 2005 | Released | Cody McKay | St. Louis Cardinals | — | Release |
| Jul 10, 2005 | Released | Benji Gil | New York Mets | — | Release |
| Jul 9, 2005 | Released | Rob Bell | Tampa Bay Devil Rays | — | Release |
| Jul 9, 2005 | Released | Dave Matranga | Los Angeles Angels of Anaheim | — | Release |
| Jul 8, 2005 | Released | Brandon Larson | Texas Rangers | — | Release |
| Jul 8, 2005 | Released | Scott Randall | Colorado Rockies | — | Release |
| Jul 8, 2005 | Signed | Rafael Ynoa | — | Los Angeles Dodgers | Amateur free agent signing |
| Jul 7, 2005 | Signed | Alberto Cabrera | — | Chicago Cubs | Amateur free agent signing |
| Jul 7, 2005 | Signed as free agent | Mike DeJean | — | Colorado Rockies | Free agent signing |
| Jul 7, 2005 | Released | Jared Fernandez | Cincinnati Reds | — | Release |
| Jul 7, 2005 | Signed as free agent | Brad Fullmer | — | Chicago White Sox | Free agent signing |
| Jul 7, 2005 | Signed as free agent | Daniel Garcia | — | New York Yankees | Free agent signing |
| Jul 7, 2005 | Released | Trent Hubbard | Chicago Cubs | — | Release |
| Jul 7, 2005 | Signed as free agent | Al Levine | — | Florida Marlins | Free agent signing |
| Jul 7, 2005 | Signed as free agent | Matt Roney | — | Texas Rangers | Free agent signing |
| Jul 7, 2005 | Trade | Ramon Vazquez | Boston Red Sox | Cleveland Indians | Trade |
| Jul 7, 2005 | Trade | Alex Cora | Cleveland Indians | Boston Red Sox | Trade |
| Jul 6, 2005 | Signed | Cesar Cabral | — | Boston Red Sox | Amateur free agent signing |
| Jul 5, 2005 | Signed as free agent | J. R. Phillips | — | Houston Astros | Free agent signing |
| Jul 4, 2005 | Signed as free agent | Vladimir Nunez | — | Arizona Diamondbacks | Free agent signing |
| Jul 4, 2005 | Released | Chris Singleton | Tampa Bay Devil Rays | — | Release |
| Jul 4, 2005 | Released | Amaury Telemaco | Philadelphia Phillies | — | Release |
| Jul 3, 2005 | Signed as free agent | Jimmy Serrano | — | Cincinnati Reds | Free agent signing |
| Jul 2, 2005 | Released | Rick Bauer | Baltimore Orioles | — | Release |
| Jul 2, 2005 | Released | John Franco | Houston Astros | — | Release |
| Jul 2, 2005 | Signed as free agent | David Lee | — | San Francisco Giants | Free agent signing |
| Jul 2, 2005 | Released | Vladimir Nunez | St. Louis Cardinals | — | Release |
| Jul 2, 2005 | Trade | Unnamed | San Diego Padres | New York Yankees | $ |
| Jul 2, 2005 | Trade | Darrell May | San Diego Padres | New York Yankees | Trade |
| Jul 2, 2005 | Trade | Tim Redding | San Diego Padres | New York Yankees | Trade |
| Jul 2, 2005 | Trade | Paul Quantrill | New York Yankees | San Diego Padres | Trade |
| Jul 2, 2005 | Signed | Jose Alvarez | — | Boston Red Sox | Amateur free agent signing |
| Jul 2, 2005 | Signed | Zoilo Almonte | — | New York Yankees | Amateur free agent signing |
| Jul 2, 2005 | Signed | J. C. Ramirez | — | Seattle Mariners | Amateur free agent signing |
| Jul 2, 2005 | Signed | Abraham Almonte | — | New York Yankees | Amateur free agent signing |
| Jul 2, 2005 | Signed | Deolis Guerra | — | New York Mets | Amateur free agent signing |
| Jul 2, 2005 | Signed | Fabio Castillo | — | Texas Rangers | Amateur free agent signing |
| Jul 1, 2005 | Signed as free agent | Manny Aybar | — | New York Mets | Free agent signing |
| Jul 1, 2005 | Signed as free agent | Brian Boehringer | — | New York Yankees | Free agent signing |
| Jul 1, 2005 | Released | David Lee | New York Mets | — | Release |
| Jul 1, 2005 | Signed as free agent | Chris Mears | — | St. Louis Cardinals | Free agent signing |
| Jul 1, 2005 | Released | Matt Roney | Detroit Tigers | — | Release |
| Jul 1, 2005 | Released | Jimmy Serrano | Oakland Athletics | — | Release |
| Jul 1, 2005 | Signed as free agent | Jason Standridge | — | Cincinnati Reds | Free agent signing |
| Jul 1, 2005 | Released | Mike Stanton | New York Yankees | — | Release |
| Jul 1, 2005 | Signed as free agent | John Stephens | — | Baltimore Orioles | Free agent signing |
| Jul 1, 2005 | Released | Kevin Tolar | Arizona Diamondbacks | — | Release |
| Jun 30, 2005 | Signed as free agent | Pedro Astacio | — | San Diego Padres | Free agent signing |
| Jun 30, 2005 | Released | Tom Martin | Houston Astros | — | Release |
| Jun 30, 2005 | Released | Jason Standridge | Texas Rangers | — | Release |
| Jun 29, 2005 | Released | Joe Borowski | Chicago Cubs | — | Release |
| Jun 29, 2005 | Signed as free agent | Dave Coggin | — | Tampa Bay Devil Rays | Free agent signing |
| Jun 29, 2005 | Released | Ricky Gutierrez | Chicago White Sox | — | Release |
| Jun 29, 2005 | Released | Kevin McGlinchy | Chicago Cubs | — | Release |
| Jun 29, 2005 | Signed as free agent | Lino Urdaneta | — | New York Mets | Free agent signing |
| Jun 28, 2005 | Signed as free agent | Scott Chiasson | — | San Francisco Giants | Free agent signing |
| Jun 28, 2005 | Signed as free agent | David Manning | — | Baltimore Orioles | Free agent signing |
| Jun 28, 2005 | Signed as free agent | T. J. Mathews | — | Houston Astros | Free agent signing |
| Jun 28, 2005 | Signed as free agent | Travis Phelps | — | Cincinnati Reds | Free agent signing |
| Jun 27, 2005 | Released | Corey Lee | Los Angeles Angels of Anaheim | — | Release |
| Jun 27, 2005 | Signed as free agent | Donovan Osborne | — | Florida Marlins | Free agent signing |
| Jun 26, 2005 | Signed as free agent | Will Cunnane | — | Houston Astros | Free agent signing |
| Jun 26, 2005 | Released | Chris Mears | Atlanta Braves | — | Release |
| Jun 25, 2005 | Released | Travis Phelps | Chicago Cubs | — | Release |
| Jun 24, 2005 | Released | Roger Cedeno | St. Louis Cardinals | — | Release |
| Jun 24, 2005 | Released | Les Walrond | Florida Marlins | — | Release |
| Jun 23, 2005 | Signed as free agent | Jimmy Anderson | — | Tampa Bay Devil Rays | Free agent signing |
| Jun 23, 2005 | Released | Matt Erickson | Milwaukee Brewers | — | Release |
| Jun 22, 2005 | Released | Andy Barkett | Atlanta Braves | — | Release |
| Jun 22, 2005 | Signed as free agent | Tim Crabtree | — | Texas Rangers | Free agent signing |
| Jun 22, 2005 | Released | Nelson Cruz | Detroit Tigers | — | Release |
| Jun 22, 2005 | Released | Evan Meek | Minnesota Twins | — | Release |
| Jun 22, 2005 | Signed as free agent | Kevin Orie | — | Washington Nationals | Free agent signing |
| Jun 22, 2005 | Signed as free agent | Kerry Robinson | — | Atlanta Braves | Free agent signing |
| Jun 22, 2005 | Signed as free agent | Benito Santiago | — | New York Mets | Free agent signing |
| Jun 21, 2005 | Released | Scott Chiasson | Colorado Rockies | — | Release |
| Jun 21, 2005 | Signed as free agent | Aquilino Lopez | — | Colorado Rockies | Free agent signing |
| Jun 21, 2005 | Signed as free agent | Chad Paronto | — | Atlanta Braves | Free agent signing |
| Jun 21, 2005 | Signed as free agent | Clint Sodowsky | — | Florida Marlins | Free agent signing |
| Jun 20, 2005 | Released | Miguel Asencio | San Diego Padres | — | Release |
| Jun 20, 2005 | Released | Mike DeJean | New York Mets | — | Release |
| Jun 20, 2005 | Released | Shane Halter | Chicago Cubs | — | Release |
| Jun 20, 2005 | Released | Trey Hodges | Atlanta Braves | — | Release |
| Jun 19, 2005 | Released | Jeremy Griffiths | Houston Astros | — | Release |
| Jun 19, 2005 | Signed as free agent | Shane Nance | — | Kansas City Royals | Free agent signing |
| Jun 18, 2005 | Released | Will Cunnane | Chicago Cubs | — | Release |
| Jun 18, 2005 | Released | Matt Herges | Arizona Diamondbacks | — | Release |
| Jun 17, 2005 | Released | Pedro Astacio | Texas Rangers | — | Release |
| Jun 17, 2005 | Signed | Robert Manuel | — | New York Mets | Amateur free agent signing |
| Jun 17, 2005 | Signed | Michael Martinez | — | Washington Nationals | Amateur free agent signing |
| Jun 17, 2005 | Released | Kevin Orie | Milwaukee Brewers | — | Release |
| Jun 17, 2005 | Released | Chad Paronto | Milwaukee Brewers | — | Release |
| Jun 16, 2005 | Signed as free agent | Jim Brower | — | Atlanta Braves | Free agent signing |
| Jun 16, 2005 | Released | Nate Cornejo | Detroit Tigers | — | Release |
| Jun 16, 2005 | Signed as free agent | Nate Cornejo | — | Detroit Tigers | Free agent signing |
| Jun 16, 2005 | Released | Josh Stewart | Chicago White Sox | — | Release |
| Jun 16, 2005 | Signed | Yangervis Solarte | — | Minnesota Twins | Amateur free agent signing |
| Jun 15, 2005 | Released | Jimmy Anderson | Minnesota Twins | — | Release |
| Jun 15, 2005 | Signed as free agent | Matt Ford | — | Kansas City Royals | Free agent signing |
| Jun 15, 2005 | Released | Aquilino Lopez | Los Angeles Dodgers | — | Release |
| Jun 15, 2005 | Released | Shane Nance | Arizona Diamondbacks | — | Release |
| Jun 15, 2005 | Released | Kerry Robinson | San Diego Padres | — | Release |
| Jun 14, 2005 | Released | Hector Almonte | Atlanta Braves | — | Release |
| Jun 14, 2005 | Signed | Alan Johnson | — | Colorado Rockies | Amateur free agent signing |
| Jun 14, 2005 | Signed as free agent | Amaury Telemaco | — | Philadelphia Phillies | Free agent signing |
| Jun 13, 2005 | Released | Napoleon Calzado | Baltimore Orioles | — | Release |
| Jun 13, 2005 | Released | Charles Johnson | Tampa Bay Devil Rays | — | Release |
| Jun 13, 2005 | Signed as free agent | Warren Morris | — | Milwaukee Brewers | Free agent signing |
| Jun 12, 2005 | Released | Jim Brower | San Francisco Giants | — | Release |
| Jun 12, 2005 | Released | Andres Torres | Texas Rangers | — | Release |
| Jun 12, 2005 | Released | Gabe White | St. Louis Cardinals | — | Release |
| Jun 11, 2005 | Signed as free agent | Pedro Borbon | — | Los Angeles Angels of Anaheim | Free agent signing |
| Jun 11, 2005 | Signed as free agent | Danny Graves | — | New York Mets | Free agent signing |
| Jun 11, 2005 | Released | Al Levine | San Francisco Giants | — | Release |
| Jun 10, 2005 | Signed as free agent | Darnell McDonald | — | Tampa Bay Devil Rays | Free agent signing |
| Jun 10, 2005 | Trade | John Rodriguez | Cleveland Indians | St. Louis Cardinals | Trade |
| Jun 10, 2005 | Trade | Junior Spivey | Milwaukee Brewers | Washington Nationals | Trade |
| Jun 10, 2005 | Trade | Tomo Ohka | Washington Nationals | Milwaukee Brewers | Trade |
| Jun 9, 2005 | Signed as free agent | Steve Randolph | — | Washington Nationals | Free agent signing |
| Jun 9, 2005 | Signed as free agent | Scott Stewart | — | San Diego Padres | Free agent signing |
| Jun 9, 2005 | Released | Amaury Telemaco | Philadelphia Phillies | — | Release |
| Jun 9, 2005 | Released | Justin Wayne | Kansas City Royals | — | Release |
| Jun 9, 2005 | Trade | Wilson Valdez | Seattle Mariners | San Diego Padres | Trade |
| Jun 9, 2005 | Trade | Mike Bumstead | San Diego Padres | Seattle Mariners | Trade |
| Jun 9, 2005 | Trade | R.D. Spiehs | San Diego Padres | Seattle Mariners | Trade |
| Jun 8, 2005 | Released | Mark DiFelice | Washington Nationals | — | Release |
| Jun 8, 2005 | Signed as free agent | Jose Offerman | — | New York Mets | Free agent signing |
| Jun 8, 2005 | Trade | Ugueth Urbina | Detroit Tigers | Philadelphia Phillies | Trade |
| Jun 8, 2005 | Trade | Ramon Martinez | Detroit Tigers | Philadelphia Phillies | Trade |
| Jun 8, 2005 | Trade | Placido Polanco | Philadelphia Phillies | Detroit Tigers | Trade |
| Jun 8, 2005 | Trade | Unnamed | Kansas City Royals | Baltimore Orioles | $ |
| Jun 8, 2005 | Trade | Eli Marrero | Kansas City Royals | Baltimore Orioles | Trade |
| Jun 8, 2005 | Trade | Pete Maestrales | Baltimore Orioles | Kansas City Royals | Trade |
| Jun 7, 2005 | Released | Joey Dawley | Chicago Cubs | — | Release |
| Jun 7, 2005 | Released | Seth Greisinger | Atlanta Braves | — | Release |
| Jun 6, 2005 | Signed | Neftali Feliz | — | Atlanta Braves | Amateur free agent signing |
| Jun 6, 2005 | Signed as free agent | Jason Pearson | — | Boston Red Sox | Free agent signing |
| Jun 5, 2005 | Released | Warren Morris | Cleveland Indians | — | Release |
| Jun 4, 2005 | Released | Darnell McDonald | Cleveland Indians | — | Release |
| Jun 4, 2005 | Trade | Javier Cardona | St. Louis Cardinals | Cleveland Indians | Trade |
| Jun 3, 2005 | Signed | Carlos Monasterios | — | New York Yankees | Amateur free agent signing |
| Jun 3, 2005 | Released | Steve Randolph | San Francisco Giants | — | Release |
| Jun 3, 2005 | Trade | Unnamed | San Francisco Giants | Arizona Diamondbacks | $ |
| Jun 3, 2005 | Trade | Matt Herges | San Francisco Giants | Arizona Diamondbacks | Trade |
| Jun 3, 2005 | Trade | Doug DeVore | Arizona Diamondbacks | San Francisco Giants | Trade |
| Jun 2, 2005 | Released | Dave Burba | Houston Astros | — | Release |
| Jun 2, 2005 | Released | Danny Graves | Cincinnati Reds | — | Release |
| Jun 2, 2005 | Released | Robert Person | Chicago White Sox | — | Release |
| Jun 2, 2005 | Released | John Stephens | Chicago White Sox | — | Release |
| May 31, 2005 | Released | Daniel Garcia | Cleveland Indians | — | Release |
| May 31, 2005 | Released | Raul Mondesi | Atlanta Braves | — | Release |
| May 31, 2005 | Released | Melvin Nieves | Washington Nationals | — | Release |
| May 30, 2005 | Released | Chris Brock | Tampa Bay Devil Rays | — | Release |
| May 30, 2005 | Released | Scott Stewart | New York Mets | — | Release |
| May 29, 2005 | Released | Toby Borland | St. Louis Cardinals | — | Release |
| May 29, 2005 | Released | Matt Ford | Milwaukee Brewers | — | Release |
| May 29, 2005 | Signed as free agent | Mike Saipe | — | Oakland Athletics | Free agent signing |
| May 28, 2005 | Signed as free agent | Dee Brown | — | Washington Nationals | Free agent signing |
| May 28, 2005 | Signed as free agent | Joey Dawley | — | Chicago Cubs | Free agent signing |
| May 28, 2005 | Trade | Unnamed | Chicago Cubs | San Francisco Giants | $ |
| May 28, 2005 | Trade | LaTroy Hawkins | Chicago Cubs | San Francisco Giants | Trade |
| May 28, 2005 | Trade | Jerome Williams | San Francisco Giants | Chicago Cubs | Trade |
| May 28, 2005 | Trade | David Aardsma | San Francisco Giants | Chicago Cubs | Trade |
| May 27, 2005 | Released | Tim Crabtree | Milwaukee Brewers | — | Release |
| May 27, 2005 | Signed as free agent | Rich Garces | — | Boston Red Sox | Free agent signing |
| May 27, 2005 | Signed as free agent | C. J. Nitkowski | — | Washington Nationals | Free agent signing |
| May 27, 2005 | Signed as free agent | Cody Ransom | — | Chicago Cubs | Free agent signing |
| May 27, 2005 | Signed as free agent | Justin Wayne | — | Kansas City Royals | Free agent signing |
| May 26, 2005 | Released | Joey Dawley | San Diego Padres | — | Release |
| May 26, 2005 | Released | C. J. Nitkowski | Detroit Tigers | — | Release |
| May 26, 2005 | Signed as free agent | Grant Roberts | — | New York Yankees | Free agent signing |
| May 26, 2005 | Signed as free agent | Scott Strickland | — | Houston Astros | Free agent signing |
| May 26, 2005 | Signed as free agent | Brian Sweeney | — | San Diego Padres | Free agent signing |
| May 25, 2005 | Released | Dee Brown | New York Yankees | — | Release |
| May 25, 2005 | Signed as free agent | Calvin Maduro | — | New York Yankees | Free agent signing |
| May 25, 2005 | Released | Cody Ransom | Texas Rangers | — | Release |
| May 25, 2005 | Signed | Jesus Sucre | — | Atlanta Braves | Amateur free agent signing |
| May 25, 2005 | Signed | Arquimedes Caminero | — | Florida Marlins | Amateur free agent signing |
| May 24, 2005 | Released | Terry Adams | Philadelphia Phillies | — | Release |
| May 24, 2005 | Released | Matt Blank | Florida Marlins | — | Release |
| May 24, 2005 | Released | Brian Sweeney | Tampa Bay Devil Rays | — | Release |
| May 23, 2005 | Released | Steve Cox | Tampa Bay Devil Rays | — | Release |
| May 23, 2005 | Released | Derrick Gibson | Atlanta Braves | — | Release |
| May 23, 2005 | Signed as free agent | Brian Wolfe | — | Milwaukee Brewers | Free agent signing |
| May 22, 2005 | Released | Scott Strickland | New York Mets | — | Release |
| May 21, 2005 | Signed as free agent | Dan Miceli | — | Colorado Rockies | Free agent signing |
| May 20, 2005 | Signed | Enerio Del Rosario | — | Cincinnati Reds | Amateur free agent signing |
| May 20, 2005 | Released | Jose Offerman | Philadelphia Phillies | — | Release |
| May 20, 2005 | Released | Darren Oliver | Chicago Cubs | — | Release |
| May 19, 2005 | Signed as free agent | Trey Hodges | — | Atlanta Braves | Free agent signing |
| May 18, 2005 | Released | Jim Crowell | Florida Marlins | — | Release |
| May 18, 2005 | Released | Horacio Estrada | Baltimore Orioles | — | Release |
| May 18, 2005 | Released | Shawn Sedlacek | St. Louis Cardinals | — | Release |
| May 17, 2005 | Signed as free agent | Enrique Wilson | — | Chicago Cubs | Free agent signing |
| May 17, 2005 | Trade | Tom Gregorio | Los Angeles Angels of Anaheim | Oakland Athletics | Trade |
| May 17, 2005 | Trade | Mike Ziegler | Oakland Athletics | Los Angeles Angels of Anaheim | Trade |
| May 16, 2005 | Released | Bobby Keppel | New York Mets | — | Release |
| May 16, 2005 | Released | Donaldo Mendez | San Francisco Giants | — | Release |
| May 16, 2005 | Signed as free agent | Andy Van Hekken | — | Cincinnati Reds | Free agent signing |
| May 16, 2005 | Released | Enrique Wilson | Baltimore Orioles | — | Release |
| May 15, 2005 | Signed as free agent | Mike Bell | — | Cleveland Indians | Free agent signing |
| May 15, 2005 | Signed as free agent | Steve Karsay | — | Texas Rangers | Free agent signing |
| May 15, 2005 | Released | Albie Lopez | Seattle Mariners | — | Release |
| May 15, 2005 | Signed as free agent | Steve Sparks | — | Oakland Athletics | Free agent signing |
| May 15, 2005 | Released | Justin Wayne | Los Angeles Dodgers | — | Release |
| May 14, 2005 | Signed | Brian Barton | — | Cleveland Indians | Amateur free agent signing |
| May 14, 2005 | Trade | Marlon Byrd | Philadelphia Phillies | Washington Nationals | Trade |
| May 14, 2005 | Trade | Endy Chavez | Washington Nationals | Philadelphia Phillies | Trade |
| May 13, 2005 | Signed as free agent | Peter Bergeron | — | Baltimore Orioles | Free agent signing |
| May 13, 2005 | Signed | Felix Doubront | — | Boston Red Sox | Amateur free agent signing |
| May 13, 2005 | Released | Andy Van Hekken | Atlanta Braves | — | Release |
| May 13, 2005 | Released | Brian Wolfe | Minnesota Twins | — | Release |
| May 12, 2005 | Released | Edwards Guzman | Pittsburgh Pirates | — | Release |
| May 12, 2005 | Signed | Edward Paredes | — | Seattle Mariners | Amateur free agent signing |
| May 11, 2005 | Signed as free agent | Randy Choate | — | Arizona Diamondbacks | Free agent signing |
| May 11, 2005 | Signed as free agent | Joe Depastino | — | Toronto Blue Jays | Free agent signing |
| May 10, 2005 | Signed as free agent | Juan Diaz | — | St. Louis Cardinals | Free agent signing |
| May 10, 2005 | Signed as free agent | Oscar Robles | — | Los Angeles Dodgers | Free agent signing |
| May 9, 2005 | Signed as free agent | Ricky Gutierrez | — | Chicago White Sox | Free agent signing |
| May 9, 2005 | Released | Alex Herrera | Atlanta Braves | — | Release |
| May 9, 2005 | Signed as free agent | Kris Wilson | — | New York Yankees | Free agent signing |
| May 8, 2005 | Released | Benito Santiago | Pittsburgh Pirates | — | Release |
| May 7, 2005 | Signed as free agent | Darren Oliver | — | Chicago Cubs | Free agent signing |
| May 6, 2005 | Signed as free agent | Dee Brown | — | New York Yankees | Free agent signing |
| May 6, 2005 | Signed as free agent | Anthony Ferrari | — | St. Louis Cardinals | Free agent signing |
| May 6, 2005 | Released | Jimmy Haynes | Tampa Bay Devil Rays | — | Release |
| May 6, 2005 | Released | Trey Hodges | Minnesota Twins | — | Release |
| May 6, 2005 | Released | Matt Riley | Texas Rangers | — | Release |
| May 6, 2005 | Released | Nerio Rodriguez | St. Louis Cardinals | — | Release |
| May 6, 2005 | Signed as free agent | Dan Wright | — | Seattle Mariners | Free agent signing |
| May 5, 2005 | Released | Alfredo Amezaga | Pittsburgh Pirates | — | Release |
| May 5, 2005 | Signed as free agent | Roosevelt Brown | — | Chicago White Sox | Free agent signing |
| May 5, 2005 | Released | Randy Choate | Arizona Diamondbacks | — | Release |
| May 5, 2005 | Released | Craig House | Texas Rangers | — | Release |
| May 4, 2005 | Released | Buddy Carlyle | Los Angeles Dodgers | — | Release |
| May 4, 2005 | Signed as free agent | Jesus Feliciano | — | Washington Nationals | Free agent signing |
| May 3, 2005 | Released | Steve Karsay | New York Yankees | — | Release |
| May 3, 2005 | Released | Darren Oliver | Arizona Diamondbacks | — | Release |
| May 3, 2005 | Signed as free agent | Travis Phelps | — | Chicago Cubs | Free agent signing |
| May 2, 2005 | Released | Angel Echevarria | Chicago Cubs | — | Release |
| May 2, 2005 | Signed as free agent | Trent Hubbard | — | Chicago Cubs | Free agent signing |
| May 2, 2005 | Signed as free agent | John Olerud | — | Boston Red Sox | Free agent signing |
| May 2, 2005 | Signed | Cesar Valdez | — | Arizona Diamondbacks | Amateur free agent signing |
| May 2, 2005 | Signed as free agent | Marc Valdes | — | New York Yankees | Free agent signing |
| May 1, 2005 | Released | Travis Phelps | Colorado Rockies | — | Release |
| May 1, 2005 | Released | Cody Clark | Texas Rangers | — | Release |
| Apr 30, 2005 | Signed | Gorkys Hernandez | — | Detroit Tigers | Amateur free agent signing |
| Apr 29, 2005 | Released | Jeff Farnsworth | Milwaukee Brewers | — | Release |
| Apr 29, 2005 | Released | Steve Kent | Colorado Rockies | — | Release |
| Apr 29, 2005 | Signed as free agent | Phil Norton | — | Chicago Cubs | Free agent signing |
| Apr 28, 2005 | Released | Mike Bell | St. Louis Cardinals | — | Release |
| Apr 28, 2005 | Signed as free agent | Shane Halter | — | Chicago Cubs | Free agent signing |
| Apr 28, 2005 | Signed as free agent | Dave Hansen | — | Seattle Mariners | Free agent signing |
| Apr 28, 2005 | Released | Eddie Oropesa | Chicago Cubs | — | Release |
| Apr 27, 2005 | Released | Trent Hubbard | Houston Astros | — | Release |
| Apr 26, 2005 | Signed as free agent | Robinson Cancel | — | St. Louis Cardinals | Free agent signing |
| Apr 26, 2005 | Signed as free agent | Wilton Guerrero | — | St. Louis Cardinals | Free agent signing |
| Apr 26, 2005 | Signed as free agent | Tom Martin | — | Houston Astros | Free agent signing |
| Apr 26, 2005 | Released | Steve Sparks | San Diego Padres | — | Release |
| Apr 26, 2005 | Signed as free agent | Gabe White | — | St. Louis Cardinals | Free agent signing |
| Apr 25, 2005 | Signed as free agent | Brandon Larson | — | Texas Rangers | Free agent signing |
| Apr 25, 2005 | Signed as free agent | Denny Stark | — | Colorado Rockies | Free agent signing |
| Apr 23, 2005 | Signed as free agent | Jason Boyd | — | Texas Rangers | Free agent signing |
| Apr 23, 2005 | Signed as free agent | Mike Moriarty | — | Chicago Cubs | Free agent signing |
| Apr 23, 2005 | Signed as free agent | Mike Porzio | — | Atlanta Braves | Free agent signing |
| Apr 22, 2005 | Signed as free agent | Justin Wayne | — | Los Angeles Dodgers | Free agent signing |
| Apr 21, 2005 | Signed as free agent | Armando Almanza | — | Arizona Diamondbacks | Free agent signing |
| Apr 21, 2005 | Signed as free agent | Greg Norton | — | Chicago White Sox | Free agent signing |
| Apr 20, 2005 | Released | Jim Bullinger | Kansas City Royals | — | Release |
| Apr 20, 2005 | Signed as free agent | Ruddy Lugo | — | Tampa Bay Devil Rays | Free agent signing |
| Apr 20, 2005 | Signed as free agent | John Stephens | — | Chicago White Sox | Free agent signing |
| Apr 20, 2005 | Released | Joe Winkelsas | Chicago White Sox | — | Release |
| Apr 19, 2005 | Signed as free agent | Albie Lopez | — | Seattle Mariners | Free agent signing |
| Apr 19, 2005 | Signed as free agent | Joe Nelson | — | Tampa Bay Devil Rays | Free agent signing |
| Apr 19, 2005 | Released | Dan Reichert | Seattle Mariners | — | Release |
| Apr 19, 2005 | Released | Denny Stark | Cleveland Indians | — | Release |
| Apr 18, 2005 | Released | Mike Moriarty | Boston Red Sox | — | Release |
| Apr 16, 2005 | Signed as free agent | Eric Eckenstahler | — | Cincinnati Reds | Free agent signing |
| Apr 16, 2005 | Signed as free agent | Kerry Ligtenberg | — | Arizona Diamondbacks | Free agent signing |
| Apr 16, 2005 | Released | John Stephens | Boston Red Sox | — | Release |
| Apr 15, 2005 | Signed as free agent | Jason Childers | — | Atlanta Braves | Free agent signing |
| Apr 15, 2005 | Signed as free agent | Mike Difelice | — | New York Mets | Free agent signing |
| Apr 15, 2005 | Signed as free agent | John Foster | — | Atlanta Braves | Free agent signing |
| Apr 14, 2005 | Released | Armando Almanza | San Francisco Giants | — | Release |
| Apr 14, 2005 | Signed as free agent | Jimmy Anderson | — | Minnesota Twins | Free agent signing |
| Apr 14, 2005 | Released | Tom Martin | Atlanta Braves | — | Release |
| Apr 14, 2005 | Released | Scott Mullen | Seattle Mariners | — | Release |
| Apr 14, 2005 | Released | Grant Roberts | New York Mets | — | Release |
| Apr 13, 2005 | Released | Jimmy Anderson | Chicago Cubs | — | Release |
| Apr 13, 2005 | Signed as free agent | Valerio De Los Santos | — | Florida Marlins | Free agent signing |
| Apr 13, 2005 | Signed as free agent | Anastacio Martinez | — | Boston Red Sox | Free agent signing |
| Apr 13, 2005 | Released | Kit Pellow | Seattle Mariners | — | Release |
| Apr 12, 2005 | Signed as free agent | Andrew Lorraine | — | Seattle Mariners | Free agent signing |
| Apr 12, 2005 | Signed as free agent | Darren Oliver | — | Arizona Diamondbacks | Free agent signing |
| Apr 11, 2005 | Signed as free agent | Robby Hammock | — | Arizona Diamondbacks | Free agent signing |
| Apr 10, 2005 | Signed as free agent | Andy Barkett | — | Atlanta Braves | Free agent signing |
| Apr 9, 2005 | Signed as free agent | Brooks Kieschnick | — | Houston Astros | Free agent signing |
| Apr 9, 2005 | Signed as free agent | Aaron Looper | — | Seattle Mariners | Free agent signing |
| Apr 9, 2005 | Signed as free agent | Abraham Nunez | — | Seattle Mariners | Free agent signing |
| Apr 9, 2005 | Signed as free agent | Jay Witasick | — | Colorado Rockies | Free agent signing |
| Apr 9, 2005 | Trade | Jose Acevedo | Cincinnati Reds | Colorado Rockies | Trade |
| Apr 9, 2005 | Trade | Allan Simpson | Colorado Rockies | Cincinnati Reds | Trade |
| Apr 8, 2005 | Signed as free agent | Amaury Telemaco | — | Philadelphia Phillies | Free agent signing |
| Apr 8, 2005 | Trade | Bobby Seay | Tampa Bay Devil Rays | Colorado Rockies | Trade |
| Apr 8, 2005 | Trade | Reggie Taylor | Colorado Rockies | Tampa Bay Devil Rays | Trade |
| Apr 7, 2005 | Signed as free agent | Brian Buchanan | — | Colorado Rockies | Free agent signing |
| Apr 7, 2005 | Released | Eddie Gaillard | Colorado Rockies | — | Release |
| Apr 7, 2005 | Signed | Kendrys Morales | — | Los Angeles Angels of Anaheim | Amateur free agent signing |
| Apr 7, 2005 | Signed as free agent | Kerry Robinson | — | San Diego Padres | Free agent signing |
| Apr 7, 2005 | Released | Jay Witasick | Baltimore Orioles | — | Release |
| Apr 6, 2005 | Released | Joe Depastino | New York Yankees | — | Release |
| Apr 6, 2005 | Signed as free agent | Michael Neu | — | Los Angeles Dodgers | Free agent signing |
| Apr 6, 2005 | Signed as free agent | C. J. Nitkowski | — | Detroit Tigers | Free agent signing |
| Apr 5, 2005 | Signed as free agent | Chris Michalak | — | Arizona Diamondbacks | Free agent signing |
| Apr 5, 2005 | Released | Marc Valdes | New York Yankees | — | Release |
| Apr 4, 2005 | Signed | Ezequiel Carrera | — | New York Mets | Amateur free agent signing |
| Apr 4, 2005 | Released | Eric Eckenstahler | Chicago Cubs | — | Release |
| Apr 4, 2005 | Signed as free agent | Wayne Franklin | — | New York Yankees | Free agent signing |
| Apr 4, 2005 | Signed | Jeanmar Gomez | — | Cleveland Indians | Amateur free agent signing |
| Apr 4, 2005 | Signed as free agent | Charles Johnson | — | Tampa Bay Devil Rays | Free agent signing |
| Apr 4, 2005 | Released | Donovan Osborne | Arizona Diamondbacks | — | Release |
| Apr 4, 2005 | Released | Mike Rivera | Detroit Tigers | — | Release |
| Apr 3, 2005 | Signed as free agent | Kevin Barker | — | Toronto Blue Jays | Free agent signing |
| Apr 3, 2005 | Released | Peter Bergeron | Chicago Cubs | — | Release |
| Apr 3, 2005 | Released | Robinson Cancel | Chicago Cubs | — | Release |
| Apr 3, 2005 | Released | Ricky Gutierrez | Seattle Mariners | — | Release |
| Apr 3, 2005 | Released | Chris Michalak | Toronto Blue Jays | — | Release |
| Apr 3, 2005 | Signed as free agent | Scott Mullen | — | Seattle Mariners | Free agent signing |
| Apr 3, 2005 | Signed as free agent | Peter Munro | — | New York Yankees | Free agent signing |
| Apr 3, 2005 | Signed as free agent | Eric Munson | — | Tampa Bay Devil Rays | Free agent signing |
| Apr 2, 2005 | Released | Dee Brown | Tampa Bay Devil Rays | — | Release |
| Apr 2, 2005 | Released | Brandon Larson | Tampa Bay Devil Rays | — | Release |
| Apr 2, 2005 | Released | Andrew Lorraine | Baltimore Orioles | — | Release |
| Apr 2, 2005 | Released | Abraham Nunez | Seattle Mariners | — | Release |
| Apr 2, 2005 | Signed as free agent | Steve Randolph | — | San Francisco Giants | Free agent signing |
| Apr 2, 2005 | Signed as free agent | Mike Smith | — | Philadelphia Phillies | Free agent signing |
| Apr 2, 2005 | Trade | Steve Colyer | Detroit Tigers | New York Mets | Trade |
| Apr 2, 2005 | Trade | Matt Ginter | New York Mets | Detroit Tigers | Trade |
| Apr 1, 2005 | Released | Kevin Barker | Philadelphia Phillies | — | Release |
| Apr 1, 2005 | Released | Dave Coggin | Colorado Rockies | — | Release |
| Apr 1, 2005 | Released | Bobby Cramer | Tampa Bay Devil Rays | — | Release |
| Apr 1, 2005 | Released | Anthony Ferrari | Washington Nationals | — | Release |
| Apr 1, 2005 | Signed as free agent | Andy Fox | — | Los Angeles Angels of Anaheim | Free agent signing |
| Apr 1, 2005 | Released | Ben Grieve | Pittsburgh Pirates | — | Release |
| Apr 1, 2005 | Signed as free agent | Ben Grieve | — | Chicago Cubs | Free agent signing |
| Apr 1, 2005 | Released | Kerry Ligtenberg | Toronto Blue Jays | — | Release |
| Apr 1, 2005 | Released | Joe Nelson | New York Mets | — | Release |
| Apr 1, 2005 | Released | J. J. Trujillo | Kansas City Royals | — | Release |
| Apr 1, 2005 | Released | Justin Wayne | Florida Marlins | — | Release |
| Mar 31, 2005 | Released | Jason Childers | Boston Red Sox | — | Release |
| Mar 31, 2005 | Released | Shane Halter | Tampa Bay Devil Rays | — | Release |
| Mar 31, 2005 | Released | Dave Hansen | Chicago Cubs | — | Release |
| Mar 31, 2005 | Released | Michael Neu | Florida Marlins | — | Release |
| Mar 31, 2005 | Released | C. J. Nitkowski | Minnesota Twins | — | Release |
| Mar 31, 2005 | Released | Darren Oliver | Colorado Rockies | — | Release |
| Mar 31, 2005 | Released | Kerry Robinson | New York Mets | — | Release |
| Mar 31, 2005 | Released | Kris Wilson | Boston Red Sox | — | Release |
| Mar 31, 2005 | Trade | Jorge Sosa | Tampa Bay Devil Rays | Atlanta Braves | Trade |
| Mar 31, 2005 | Trade | Nick Green | Atlanta Braves | Tampa Bay Devil Rays | Trade |
| Mar 30, 2005 | Released | Brian Bowles | Chicago White Sox | — | Release |
| Mar 30, 2005 | Released | Wayne Franklin | San Francisco Giants | — | Release |
| Mar 30, 2005 | Released | Wilton Guerrero | St. Louis Cardinals | — | Release |
| Mar 30, 2005 | Released | Charles Johnson | Boston Red Sox | — | Release |
| Mar 30, 2005 | Released | John Lindsey | St. Louis Cardinals | — | Release |
| Mar 30, 2005 | Released | Ruddy Lugo | Florida Marlins | — | Release |
| Mar 30, 2005 | Released | Scott Mullen | San Diego Padres | — | Release |
| Mar 30, 2005 | Signed as free agent | Robert Person | — | Chicago White Sox | Free agent signing |
| Mar 30, 2005 | Released | Steve Randolph | Chicago Cubs | — | Release |
| Mar 30, 2005 | Released | Amaury Telemaco | Philadelphia Phillies | — | Release |
| Mar 30, 2005 | Released | Gabe White | Atlanta Braves | — | Release |
| Mar 30, 2005 | Trade | Matt Riley | Baltimore Orioles | Texas Rangers | Trade |
| Mar 30, 2005 | Trade | Ramon Nivar | Texas Rangers | Baltimore Orioles | Trade |
| Mar 30, 2005 | Trade | Unnamed | Boston Red Sox | Colorado Rockies | $ |
| Mar 30, 2005 | Trade | Byung-Hyun Kim | Boston Red Sox | Colorado Rockies | Trade |
| Mar 30, 2005 | Trade | Charles Johnson | Colorado Rockies | Boston Red Sox | Trade |
| Mar 30, 2005 | Trade | Chris Narveson | Colorado Rockies | Boston Red Sox | Trade |
| Mar 30, 2005 | Signed | Carlos Rivero | — | Cleveland Indians | Amateur free agent signing |
| Mar 29, 2005 | Released | Nate Bland | Seattle Mariners | — | Release |
| Mar 29, 2005 | Released | Roosevelt Brown | Atlanta Braves | — | Release |
| Mar 29, 2005 | Released | Brian Buchanan | Tampa Bay Devil Rays | — | Release |
| Mar 29, 2005 | Released | Brooks Kieschnick | Milwaukee Brewers | — | Release |
| Mar 29, 2005 | Released | Anastacio Martinez | Boston Red Sox | — | Release |
| Mar 29, 2005 | Released | Greg Norton | Colorado Rockies | — | Release |
| Mar 29, 2005 | Trade | Carlos De La Cruz | Boston Red Sox | St. Louis Cardinals | Trade |
| Mar 29, 2005 | Trade | Kevin Ool | Boston Red Sox | St. Louis Cardinals | Trade |
| Mar 29, 2005 | Trade | Mike Myers | St. Louis Cardinals | Boston Red Sox | Trade |
| Mar 29, 2005 | Trade | Wil Nieves | Los Angeles Angels of Anaheim | New York Yankees | Trade |
| Mar 29, 2005 | Trade | Bret Prinz | New York Yankees | Los Angeles Angels of Anaheim | Trade |
| Mar 29, 2005 | Trade | Cliff Bartosh | Cleveland Indians | Chicago Cubs | Trade |
| Mar 29, 2005 | Trade | Bear Bay | Chicago Cubs | Cleveland Indians | Trade |
| Mar 28, 2005 | Released | Hector Mercado | St. Louis Cardinals | — | Release |
| Mar 28, 2005 | Released | Mike Smith | Toronto Blue Jays | — | Release |
| Mar 28, 2005 | Trade | Carlos Torres | Boston Red Sox | Washington Nationals | Trade |
| Mar 28, 2005 | Trade | Unnamed | Houston Astros | San Diego Padres | $ |
| Mar 28, 2005 | Trade | Tim Redding | Houston Astros | San Diego Padres | Trade |
| Mar 28, 2005 | Trade | Humberto Quintero | San Diego Padres | Houston Astros | Trade |
| Mar 27, 2005 | Released | Mike Difelice | Florida Marlins | — | Release |
| Mar 27, 2005 | Released | Andy Fox | Minnesota Twins | — | Release |
| Mar 27, 2005 | Released | Eric Munson | Minnesota Twins | — | Release |
| Mar 26, 2005 | Signed as free agent | Jorge Campillo | — | Seattle Mariners | Free agent signing |
| Mar 26, 2005 | Signed as free agent | Jared Sandberg | — | Boston Red Sox | Free agent signing |
| Mar 26, 2005 | Trade | Mark Johnson | Milwaukee Brewers | Chicago Cubs | Trade |
| Mar 26, 2005 | Trade | Travis Ezi | Chicago Cubs | Milwaukee Brewers | Trade |
| Mar 25, 2005 | Released | Keith Osik | Washington Nationals | — | Release |
| Mar 24, 2005 | Released | Adam Johnson | Arizona Diamondbacks | — | Release |
| Mar 23, 2005 | Signed | Yuniesky Betancourt | — | Seattle Mariners | Amateur free agent signing |
| Mar 23, 2005 | Released | Michael Coleman | Washington Nationals | — | Release |
| Mar 23, 2005 | Released | Albie Lopez | Pittsburgh Pirates | — | Release |
| Mar 23, 2005 | Released | Jason Pearson | Florida Marlins | — | Release |
| Mar 23, 2005 | Released | Ken Ray | Chicago White Sox | — | Release |
| Mar 23, 2005 | Released | Jared Sandberg | Washington Nationals | — | Release |
| Mar 22, 2005 | Signed as free agent | Joe McEwing | — | Kansas City Royals | Free agent signing |
| Mar 22, 2005 | Trade | Adam Hyzdu | Boston Red Sox | San Diego Padres | Trade |
| Mar 22, 2005 | Trade | Blaine Neal | San Diego Padres | Boston Red Sox | Trade |
| Mar 22, 2005 | Trade | Tyrell Godwin | Toronto Blue Jays | Washington Nationals | Trade |
| Mar 22, 2005 | Trade | A.J. Wideman | Washington Nationals | Toronto Blue Jays | Trade |
| Mar 21, 2005 | Signed as free agent | Daniel Garcia | — | Cleveland Indians | Free agent signing |
| Mar 20, 2005 | Trade | Kazuhisa Ishii | Los Angeles Dodgers | New York Mets | Trade |
| Mar 20, 2005 | Trade | Jason Phillips | New York Mets | Los Angeles Dodgers | Trade |
| Mar 19, 2005 | Signed as free agent | Alex Sanchez | — | Tampa Bay Devil Rays | Free agent signing |
| Mar 17, 2005 | Released | Joe McEwing | New York Mets | — | Release |
| Mar 16, 2005 | Released | Peter Munro | Houston Astros | — | Release |
| Mar 16, 2005 | Released | R. J. Swindle | Boston Red Sox | — | Release |
| Mar 15, 2005 | Signed as free agent | Ariel Prieto | — | Florida Marlins | Free agent signing |
| Mar 15, 2005 | Released | Alex Sanchez | Detroit Tigers | — | Release |
| Mar 14, 2005 | Released | Dave Elder | Cincinnati Reds | — | Release |
| Mar 13, 2005 | Signed as free agent | Jeff Farnsworth | — | Milwaukee Brewers | Free agent signing |
| Mar 8, 2005 | Signed as free agent | Brian Daubach | — | New York Mets | Free agent signing |
| Mar 8, 2005 | Signed as free agent | Jeremy Giambi | — | Chicago White Sox | Free agent signing |
| Mar 8, 2005 | Released | J. R. House | Pittsburgh Pirates | — | Release |
| Mar 7, 2005 | Signed as free agent | Alfredo Figaro | — | Detroit Tigers | Free agent signing |
| Mar 7, 2005 | Signed as free agent | David Lee | — | New York Mets | Free agent signing |
| Mar 7, 2005 | Signed as free agent | Jeff Zimmerman | — | Texas Rangers | Free agent signing |
| Mar 6, 2005 | Signed as free agent | Brian Bowles | — | Chicago White Sox | Free agent signing |
| Mar 6, 2005 | Signed as free agent | Chris Richard | — | Texas Rangers | Free agent signing |
| Mar 6, 2005 | Signed as free agent | Phil Stockman | — | Arizona Diamondbacks | Free agent signing |
| Mar 5, 2005 | Signed as free agent | Craig House | — | Texas Rangers | Free agent signing |
| Mar 5, 2005 | Signed as free agent | Jerrod Riggan | — | New York Mets | Free agent signing |
| Mar 5, 2005 | Signed as free agent | Jose Santiago | — | New York Mets | Free agent signing |
| Mar 3, 2005 | Signed as free agent | Craig Breslow | — | San Diego Padres | Free agent signing |
| Mar 3, 2005 | Signed as free agent | Carlos Febles | — | Kansas City Royals | Free agent signing |
| Mar 3, 2005 | Signed | David Martinez | — | Houston Astros | Amateur free agent signing |
| Mar 2, 2005 | Signed as free agent | Horacio Estrada | — | Baltimore Orioles | Free agent signing |
| Mar 2, 2005 | Signed as free agent | Scott MacRae | — | Houston Astros | Free agent signing |
| Mar 1, 2005 | Signed as free agent | Dave Coggin | — | Colorado Rockies | Free agent signing |
| Feb 28, 2005 | Signed as free agent | Matt Anderson | — | Colorado Rockies | Free agent signing |
| Feb 28, 2005 | Signed as free agent | Dave Elder | — | Cincinnati Reds | Free agent signing |
| Feb 28, 2005 | Signed as free agent | Chris Michalak | — | Toronto Blue Jays | Free agent signing |
| Feb 28, 2005 | Signed as free agent | Shawn Sedlacek | — | Colorado Rockies | Free agent signing |
| Feb 28, 2005 | Signed as free agent | Dewayne Wise | — | Detroit Tigers | Free agent signing |
| Feb 24, 2005 | Signed as free agent | Matt Diaz | — | Kansas City Royals | Free agent signing |
| Feb 23, 2005 | Signed as free agent | Andy Ashby | — | San Diego Padres | Free agent signing |
| Feb 23, 2005 | Signed as free agent | Pedro Astacio | — | Texas Rangers | Free agent signing |
| Feb 23, 2005 | Signed as free agent | Carlos Baerga | — | Washington Nationals | Free agent signing |
| Feb 22, 2005 | Signed as free agent | Derrin Ebert | — | Kansas City Royals | Free agent signing |
| Feb 21, 2005 | Signed as free agent | Luke Allen | — | Los Angeles Angels of Anaheim | Free agent signing |
| Feb 21, 2005 | Signed as free agent | Clayton Andrews | — | Los Angeles Angels of Anaheim | Free agent signing |
| Feb 21, 2005 | Signed as free agent | Javier Cardona | — | Colorado Rockies | Free agent signing |
| Feb 21, 2005 | Signed as free agent | Donovan Osborne | — | Arizona Diamondbacks | Free agent signing |
| Feb 21, 2005 | Signed as free agent | Bill Pulsipher | — | St. Louis Cardinals | Free agent signing |
| Feb 21, 2005 | Signed as free agent | Mike Vento | — | New York Yankees | Free agent signing |
| Feb 20, 2005 | Signed as free agent | Bernie Castro | — | Baltimore Orioles | Free agent signing |
| Feb 19, 2005 | Signed as free agent | Robert Fick | — | San Diego Padres | Free agent signing |
| Feb 19, 2005 | Signed as free agent | Kevin Jarvis | — | St. Louis Cardinals | Free agent signing |
| Feb 19, 2005 | Signed as free agent | Mike Venafro | — | Arizona Diamondbacks | Free agent signing |
| Feb 19, 2005 | Signed as free agent | Pete Walker | — | Toronto Blue Jays | Free agent signing |
| Feb 18, 2005 | Signed as free agent | Mark Johnson | — | Detroit Tigers | Free agent signing |
| Feb 18, 2005 | Signed as free agent | Ramiro Mendoza | — | New York Yankees | Free agent signing |
| Feb 18, 2005 | Signed as free agent | Hector Ortiz | — | Washington Nationals | Free agent signing |
| Feb 18, 2005 | Signed | Ramiro Peña | — | New York Yankees | Amateur free agent signing |
| Feb 18, 2005 | Trade | Brad Murray | Chicago White Sox | Arizona Diamondbacks | Trade |
| Feb 17, 2005 | Signed | Antonio Bastardo | — | Philadelphia Phillies | Amateur free agent signing |
| Feb 17, 2005 | Signed as free agent | Raul Casanova | — | Chicago White Sox | Free agent signing |
| Feb 16, 2005 | Signed as free agent | Edwin Almonte | — | Detroit Tigers | Free agent signing |
| Feb 16, 2005 | Signed as free agent | Will Cunnane | — | Chicago Cubs | Free agent signing |
| Feb 16, 2005 | Signed | Ali Solis | — | San Diego Padres | Amateur free agent signing |
| Feb 15, 2005 | Signed as free agent | Vic Darensbourg | — | Detroit Tigers | Free agent signing |
| Feb 15, 2005 | Signed as free agent | Alejandro Freire | — | Baltimore Orioles | Free agent signing |
| Feb 15, 2005 | Signed as free agent | Dave Hansen | — | Chicago Cubs | Free agent signing |
| Feb 15, 2005 | Signed as free agent | Pat Mahomes | — | New York Mets | Free agent signing |
| Feb 15, 2005 | Signed as free agent | Felix Martinez | — | Chicago White Sox | Free agent signing |
| Feb 15, 2005 | Signed as free agent | Lou Merloni | — | Los Angeles Angels of Anaheim | Free agent signing |
| Feb 15, 2005 | Trade | Alejandro Machado | Washington Nationals | Boston Red Sox | Trade |
| Feb 14, 2005 | Signed as free agent | Scott Randall | — | Colorado Rockies | Free agent signing |
| Feb 14, 2005 | Signed as free agent | Todd Van Poppel | — | New York Mets | Free agent signing |
| Feb 13, 2005 | Trade | Jerry Owens | Washington Nationals | Chicago White Sox | Trade |
| Feb 13, 2005 | Trade | Alex Escobar | Chicago White Sox | Washington Nationals | Trade |
| Feb 11, 2005 | Signed as free agent | Juan Acevedo | — | Arizona Diamondbacks | Free agent signing |
| Feb 11, 2005 | Signed as free agent | Trent Hubbard | — | Houston Astros | Free agent signing |
| Feb 11, 2005 | Signed as free agent | Travis Lee | — | Tampa Bay Devil Rays | Free agent signing |
| Feb 11, 2005 | Signed as free agent | Roberto Petagine | — | Boston Red Sox | Free agent signing |
| Feb 10, 2005 | Signed as free agent | Jason Grilli | — | Detroit Tigers | Free agent signing |
| Feb 9, 2005 | Signed as free agent | Buddy Groom | — | New York Yankees | Free agent signing |
| Feb 9, 2005 | Signed as free agent | Brian Hunter | — | Kansas City Royals | Free agent signing |
| Feb 9, 2005 | Signed as free agent | Christian Parker | — | Colorado Rockies | Free agent signing |
| Feb 9, 2005 | Trade | Roberto Novoa | Detroit Tigers | Chicago Cubs | Trade |
| Feb 9, 2005 | Trade | Scott Moore | Detroit Tigers | Chicago Cubs | Trade |
| Feb 9, 2005 | Trade | Bo Flowers | Detroit Tigers | Chicago Cubs | Trade |
| Feb 9, 2005 | Trade | Kyle Farnsworth | Chicago Cubs | Detroit Tigers | Trade |
| Feb 8, 2005 | Signed as free agent | Chris Booker | — | Cincinnati Reds | Free agent signing |
| Feb 8, 2005 | Signed as free agent | Scott McClain | — | Chicago Cubs | Free agent signing |
| Feb 8, 2005 | Released | Matt Skrmetta | Washington Nationals | — | Release |
| Feb 7, 2005 | Signed as free agent | Dave Berg | — | Boston Red Sox | Free agent signing |
| Feb 7, 2005 | Signed as free agent | Jeff Cirillo | — | Milwaukee Brewers | Free agent signing |
| Feb 7, 2005 | Signed as free agent | Damian Moss | — | Seattle Mariners | Free agent signing |
| Feb 7, 2005 | Signed as free agent | Denny Neagle | — | Tampa Bay Devil Rays | Free agent signing |
| Feb 7, 2005 | Signed as free agent | Melvin Nieves | — | Washington Nationals | Free agent signing |
| Feb 7, 2005 | Signed as free agent | Magglio Ordonez | — | Detroit Tigers | Free agent signing |
| Feb 7, 2005 | Released | Dewayne Wise | Detroit Tigers | — | Release |
| Feb 7, 2005 | Signed | Arcenio Leon | — | Houston Astros | Amateur free agent signing |
| Feb 6, 2005 | Trade | Unnamed | Tampa Bay Devil Rays | Arizona Diamondbacks | $ |
| Feb 6, 2005 | Trade | Jose Cruz | Tampa Bay Devil Rays | Arizona Diamondbacks | Trade |
| Feb 6, 2005 | Trade | Casey Fossum | Arizona Diamondbacks | Tampa Bay Devil Rays | Trade |
| Feb 5, 2005 | Signed as free agent | Jeromy Burnitz | — | Chicago Cubs | Free agent signing |
| Feb 4, 2005 | Signed as free agent | Juan Sosa | — | Philadelphia Phillies | Free agent signing |
| Feb 3, 2005 | Signed as free agent | Hector Carrasco | — | Washington Nationals | Free agent signing |
| Feb 3, 2005 | Signed as free agent | Scott Mullen | — | San Diego Padres | Free agent signing |
| Feb 3, 2005 | Signed as free agent | Norihiro Nakamura | — | Los Angeles Dodgers | Free agent signing with first major-league team |
| Feb 3, 2005 | Signed | Aneury Rodriguez | — | Colorado Rockies | Amateur free agent signing |
| Feb 3, 2005 | Signed as free agent | Scott Stewart | — | New York Mets | Free agent signing |
| Feb 2, 2005 | Signed as free agent | Hector Almonte | — | Atlanta Braves | Free agent signing |
| Feb 2, 2005 | Signed as free agent | Trace Coquillette | — | Chicago White Sox | Free agent signing |
| Feb 2, 2005 | Signed as free agent | Al Levine | — | San Francisco Giants | Free agent signing |
| Feb 2, 2005 | Signed as free agent | Jim Mecir | — | Florida Marlins | Free agent signing |
| Feb 2, 2005 | Signed as free agent | Hector Mercado | — | St. Louis Cardinals | Free agent signing |
| Feb 2, 2005 | Trade | Unnamed | Chicago Cubs | Baltimore Orioles | $ |
| Feb 2, 2005 | Trade | Sammy Sosa | Chicago Cubs | Baltimore Orioles | Trade |
| Feb 2, 2005 | Trade | Jerry Hairston | Baltimore Orioles | Chicago Cubs | Trade |
| Feb 2, 2005 | Trade | Mike Fontenot | Baltimore Orioles | Chicago Cubs | Trade |
| Feb 2, 2005 | Trade | Dave Crouthers | Baltimore Orioles | Chicago Cubs | Trade |
| Feb 1, 2005 | Signed as free agent | Derrick Gibson | — | Atlanta Braves | Free agent signing |
| Feb 1, 2005 | Signed as free agent | Jed Hansen | — | New York Mets | Free agent signing |
| Jan 31, 2005 | Signed as free agent | Jim Bullinger | — | Kansas City Royals | Free agent signing |
| Jan 31, 2005 | Signed as free agent | Joe Depastino | — | New York Yankees | Free agent signing |
| Jan 31, 2005 | Signed as free agent | Scott Erickson | — | Los Angeles Dodgers | Free agent signing |
| Jan 31, 2005 | Signed as free agent | Mike Matthews | — | New York Mets | Free agent signing |
| Jan 31, 2005 | Signed as free agent | Jeff Nelson | — | Seattle Mariners | Free agent signing |
| Jan 29, 2005 | Signed as free agent | Doug Glanville | — | New York Yankees | Free agent signing |
| Jan 29, 2005 | Signed as free agent | Tom Wilson | — | Colorado Rockies | Free agent signing |
| Jan 28, 2005 | Released | Reggie Harris | Houston Astros | — | Release |
| Jan 28, 2005 | Signed as free agent | Eric Junge | — | New York Mets | Free agent signing |
| Jan 28, 2005 | Signed as free agent | Paul Shuey | — | Cleveland Indians | Free agent signing |
| Jan 27, 2005 | Signed as free agent | Michael Coleman | — | Washington Nationals | Free agent signing |
| Jan 27, 2005 | Released | Jason Grilli | Chicago White Sox | — | Release |
| Jan 27, 2005 | Signed as free agent | Tadahito Iguchi | — | Chicago White Sox | Free agent signing with first major-league team |
| Jan 27, 2005 | Signed as free agent | Adam Johnson | — | Arizona Diamondbacks | Free agent signing |
| Jan 27, 2005 | Signed as free agent | Hideo Nomo | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 27, 2005 | Signed as free agent | Jay Powell | — | Atlanta Braves | Free agent signing |
| Jan 27, 2005 | Signed as free agent | Armando Rios | — | Minnesota Twins | Free agent signing |
| Jan 27, 2005 | Signed as free agent | Rick White | — | Pittsburgh Pirates | Free agent signing |
| Jan 27, 2005 | Trade | Unnamed | Boston Red Sox | New York Mets | $ |
| Jan 27, 2005 | Trade | Doug Mientkiewicz | Boston Red Sox | New York Mets | Trade |
| Jan 27, 2005 | Trade | Ian Bladergroen | New York Mets | Boston Red Sox | Trade |
| Jan 26, 2005 | Signed as free agent | Carlos Delgado | — | Florida Marlins | Free agent signing |
| Jan 26, 2005 | Released | Daniel Garcia | New York Mets | — | Release |
| Jan 26, 2005 | Released | Robby Hammock | Arizona Diamondbacks | — | Release |
| Jan 26, 2005 | Signed as free agent | Albie Lopez | — | Pittsburgh Pirates | Free agent signing |
| Jan 26, 2005 | Signed as free agent | Peter Zoccolillo | — | St. Louis Cardinals | Free agent signing |
| Jan 25, 2005 | Signed | Elvis Andrus | — | Atlanta Braves | Amateur free agent signing |
| Jan 25, 2005 | Signed as free agent | Matt DeWitt | — | Milwaukee Brewers | Free agent signing |
| Jan 25, 2005 | Signed as free agent | Eddie Gaillard | — | Colorado Rockies | Free agent signing |
| Jan 25, 2005 | Signed as free agent | Benji Gil | — | Seattle Mariners | Free agent signing |
| Jan 25, 2005 | Released | Aaron Looper | Seattle Mariners | — | Release |
| Jan 25, 2005 | Signed as free agent | Darnell McDonald | — | Cleveland Indians | Free agent signing |
| Jan 25, 2005 | Signed as free agent | Todd Sears | — | Florida Marlins | Free agent signing |
| Jan 25, 2005 | Signed as free agent | Steve Sparks | — | San Diego Padres | Free agent signing |
| Jan 24, 2005 | Signed as free agent | Tony Clark | — | Arizona Diamondbacks | Free agent signing |
| Jan 24, 2005 | Signed as free agent | Lee Gardner | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 24, 2005 | Released | Adam Johnson | Minnesota Twins | — | Release |
| Jan 24, 2005 | Signed as free agent | C. J. Nitkowski | — | Minnesota Twins | Free agent signing |
| Jan 24, 2005 | Signed as free agent | Wilfredo Rodriguez | — | Texas Rangers | Free agent signing |
| Jan 24, 2005 | Signed as free agent | Pedro Swann | — | Cincinnati Reds | Free agent signing |
| Jan 24, 2005 | Signed as free agent | Marc Valdes | — | New York Yankees | Free agent signing |
| Jan 23, 2005 | Signed as free agent | John Franco | — | Houston Astros | Free agent signing |
| Jan 23, 2005 | Signed as free agent | Rey Sanchez | — | New York Yankees | Free agent signing |
| Jan 22, 2005 | Signed as free agent | Rich Aurilia | — | Cincinnati Reds | Free agent signing |
| Jan 22, 2005 | Signed as free agent | Scott Chiasson | — | Colorado Rockies | Free agent signing |
| Jan 22, 2005 | Signed as free agent | Darren Oliver | — | Colorado Rockies | Free agent signing |
| Jan 22, 2005 | Signed as free agent | Scott Williamson | — | Chicago Cubs | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Ricky Bottalico | — | Milwaukee Brewers | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Luis Figueroa | — | Boston Red Sox | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Bryce Florie | — | Florida Marlins | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Ben Grieve | — | Pittsburgh Pirates | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Denny Hocking | — | Kansas City Royals | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Steve Reed | — | Baltimore Orioles | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Damian Rolls | — | New York Yankees | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Jared Sandberg | — | Washington Nationals | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Chris Singleton | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Aaron Small | — | New York Yankees | Free agent signing |
| Jan 21, 2005 | Signed as free agent | Mark Watson | — | Los Angeles Angels of Anaheim | Free agent signing |
| Jan 21, 2005 | Signed | Paulo Orlando | — | Chicago White Sox | Amateur free agent signing |
| Jan 20, 2005 | Signed as free agent | Roberto Alomar | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 20, 2005 | Signed as free agent | Jason Gilfillan | — | Colorado Rockies | Free agent signing |
| Jan 20, 2005 | Signed as free agent | Frank Gracesqui | — | Florida Marlins | Free agent signing |
| Jan 20, 2005 | Signed as free agent | Wilton Guerrero | — | St. Louis Cardinals | Free agent signing |
| Jan 20, 2005 | Signed as free agent | Keith McDonald | — | Baltimore Orioles | Free agent signing |
| Jan 20, 2005 | Signed | Carlos Peguero | — | Seattle Mariners | Amateur free agent signing |
| Jan 20, 2005 | Signed as free agent | Alex Prieto | — | Philadelphia Phillies | Free agent signing |
| Jan 20, 2005 | Signed as free agent | Cody Ransom | — | Chicago Cubs | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Tony Alvarez | — | Chicago White Sox | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Dee Brown | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Nelson Cruz | — | Detroit Tigers | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Mark DeRosa | — | Texas Rangers | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Jose Jimenez | — | Arizona Diamondbacks | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Brian Jordan | — | Atlanta Braves | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Esteban Loaiza | — | Washington Nationals | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Sandy Martinez | — | Detroit Tigers | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Carlos Mendez | — | Atlanta Braves | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Jose Offerman | — | Philadelphia Phillies | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Antonio Osuna | — | Washington Nationals | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Pablo Ozuna | — | Chicago White Sox | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Jason Ryan | — | Milwaukee Brewers | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Tony Saunders | — | Baltimore Orioles | Free agent signing |
| Jan 19, 2005 | Signed as free agent | Aaron Sele | — | Seattle Mariners | Free agent signing |
| Jan 19, 2005 | Signed | Alberto Rosario | — | Los Angeles Angels of Anaheim | Amateur free agent signing |
| Jan 18, 2005 | Signed as free agent | Miguel Asencio | — | San Diego Padres | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Danny Bautista | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Roosevelt Brown | — | Atlanta Braves | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Alex Cora | — | Cleveland Indians | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Midre Cummings | — | Baltimore Orioles | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Shane Halter | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Eric Munson | — | Minnesota Twins | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Keith Osik | — | Washington Nationals | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Nerio Rodriguez | — | St. Louis Cardinals | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Eduardo Villacis | — | Chicago White Sox | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Enrique Wilson | — | Baltimore Orioles | Free agent signing |
| Jan 18, 2005 | Signed as free agent | Jay Witasick | — | Baltimore Orioles | Free agent signing |
| Jan 17, 2005 | Signed as free agent | Matt Blank | — | Florida Marlins | Free agent signing |
| Jan 17, 2005 | Signed as free agent | Matt Duff | — | Toronto Blue Jays | Free agent signing |
| Jan 17, 2005 | Signed as free agent | Juan Gonzalez | — | Cleveland Indians | Free agent signing |
| Jan 17, 2005 | Signed as free agent | Geremi Gonzalez | — | Boston Red Sox | Free agent signing |
| Jan 17, 2005 | Signed as free agent | Chris Hammond | — | San Diego Padres | Free agent signing |
| Jan 17, 2005 | Signed as free agent | Roberto Hernandez | — | New York Mets | Free agent signing |
| Jan 17, 2005 | Signed as free agent | Travis Phelps | — | Colorado Rockies | Free agent signing |
| Jan 17, 2005 | Released | Peter Zoccolillo | Texas Rangers | — | Release |
| Jan 15, 2005 | Signed as free agent | Steve Lomasney | — | Cincinnati Reds | Free agent signing |
| Jan 15, 2005 | Signed as free agent | Eddie Oropesa | — | Chicago Cubs | Free agent signing |
| Jan 15, 2005 | Signed as free agent | Todd Ritchie | — | Pittsburgh Pirates | Free agent signing |
| Jan 14, 2005 | Signed as free agent | James Baldwin | — | Baltimore Orioles | Free agent signing |
| Jan 14, 2005 | Signed as free agent | Tim Drew | — | Colorado Rockies | Free agent signing |
| Jan 14, 2005 | Signed as free agent | Chad Fox | — | Chicago Cubs | Free agent signing |
| Jan 14, 2005 | Signed as free agent | Tim Hamulack | — | New York Mets | Free agent signing |
| Jan 14, 2005 | Signed as free agent | Rick Helling | — | Milwaukee Brewers | Free agent signing |
| Jan 14, 2005 | Signed as free agent | Raul Mondesi | — | Atlanta Braves | Free agent signing |
| Jan 14, 2005 | Signed | Donovan Solano | — | St. Louis Cardinals | Amateur free agent signing |
| Jan 14, 2005 | Signed as free agent | Kevin Tolar | — | Arizona Diamondbacks | Free agent signing |
| Jan 14, 2005 | Signed as free agent | Billy Traber | — | Cleveland Indians | Free agent signing |
| Jan 13, 2005 | Signed as free agent | Paul Bako | — | Los Angeles Dodgers | Free agent signing |
| Jan 13, 2005 | Signed as free agent | Carlos Beltran | — | New York Mets | Free agent signing |
| Jan 13, 2005 | Signed as free agent | Dave Burba | — | Houston Astros | Free agent signing |
| Jan 13, 2005 | Signed as free agent | Jason Childers | — | Boston Red Sox | Free agent signing |
| Jan 13, 2005 | Signed as free agent | Ricky Gutierrez | — | Seattle Mariners | Free agent signing |
| Jan 13, 2005 | Signed as free agent | Hansel Izquierdo | — | Pittsburgh Pirates | Free agent signing |
| Jan 13, 2005 | Signed as free agent | Ruben Sierra | — | New York Yankees | Free agent signing |
| Jan 13, 2005 | Signed as free agent | Shawn Wooten | — | Boston Red Sox | Free agent signing |
| Jan 12, 2005 | Signed as free agent | Jason Bere | — | Cleveland Indians | Free agent signing |
| Jan 12, 2005 | Signed as free agent | Chris Brock | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 12, 2005 | Signed as free agent | Orlando Cabrera | — | Los Angeles Angels of Anaheim | Free agent signing |
| Jan 12, 2005 | Signed as free agent | Shawn Estes | — | Arizona Diamondbacks | Free agent signing |
| Jan 12, 2005 | Signed as free agent | Bob File | — | St. Louis Cardinals | Free agent signing |
| Jan 12, 2005 | Signed as free agent | Chris Fussell | — | Houston Astros | Free agent signing |
| Jan 12, 2005 | Signed as free agent | Alex Gonzalez | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 12, 2005 | Signed | Dae-Sung Koo | — | New York Mets | Amateur free agent signing |
| Jan 12, 2005 | Signed as free agent | Alex Pelaez | — | Cincinnati Reds | Free agent signing |
| Jan 12, 2005 | Signed as free agent | Bob Smith | — | Oakland Athletics | Free agent signing |
| Jan 12, 2005 | Signed | Alex Torres | — | Los Angeles Angels of Anaheim | Amateur free agent signing |
| Jan 12, 2005 | Signed as free agent | Keiichi Yabu | — | Oakland Athletics | Free agent signing with first major-league team |
| Jan 12, 2005 | Trade | Adam Peterson | Toronto Blue Jays | Arizona Diamondbacks | Trade |
| Jan 12, 2005 | Trade | Shea Hillenbrand | Arizona Diamondbacks | Toronto Blue Jays | Trade |
| Jan 11, 2005 | Signed as free agent | Terry Adams | — | Philadelphia Phillies | Free agent signing |
| Jan 11, 2005 | Signed as free agent | Joey Dawley | — | San Diego Padres | Free agent signing |
| Jan 11, 2005 | Signed as free agent | Edwards Guzman | — | Pittsburgh Pirates | Free agent signing |
| Jan 11, 2005 | Signed as free agent | Corey Lee | — | Los Angeles Angels of Anaheim | Free agent signing |
| Jan 11, 2005 | Signed as free agent | Derek Lowe | — | Los Angeles Dodgers | Free agent signing |
| Jan 11, 2005 | Signed as free agent | Dave McCarty | — | Boston Red Sox | Free agent signing |
| Jan 11, 2005 | Signed as free agent | Joe Nelson | — | New York Mets | Free agent signing |
| Jan 11, 2005 | Signed as free agent | Brian Powell | — | Washington Nationals | Free agent signing |
| Jan 11, 2005 | Signed as free agent | Scott Schoeneweis | — | Toronto Blue Jays | Free agent signing |
| Jan 11, 2005 | Released | Phil Stockman | Arizona Diamondbacks | — | Release |
| Jan 11, 2005 | Trade | Unnamed | New York Yankees | Arizona Diamondbacks | $ |
| Jan 11, 2005 | Trade | Javier Vazquez | New York Yankees | Arizona Diamondbacks | Trade |
| Jan 11, 2005 | Trade | Brad Halsey | New York Yankees | Arizona Diamondbacks | Trade |
| Jan 11, 2005 | Trade | Dioner Navarro | New York Yankees | Arizona Diamondbacks | Trade |
| Jan 11, 2005 | Trade | Randy Johnson | Arizona Diamondbacks | New York Yankees | Trade |
| Jan 11, 2005 | Trade | Shawn Green | Los Angeles Dodgers | Arizona Diamondbacks | Trade |
| Jan 11, 2005 | Trade | Dioner Navarro | Arizona Diamondbacks | Los Angeles Dodgers | Trade |
| Jan 11, 2005 | Trade | Danny Muegge | Arizona Diamondbacks | Los Angeles Dodgers | Trade |
| Jan 11, 2005 | Trade | Beltran Perez | Arizona Diamondbacks | Los Angeles Dodgers | Trade |
| Jan 11, 2005 | Trade | William Juarez | Arizona Diamondbacks | Los Angeles Dodgers | Trade |
| Jan 10, 2005 | Signed as free agent | Larry Barnes | — | Florida Marlins | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Miguel Cairo | — | New York Mets | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Travis Dawkins | — | Detroit Tigers | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Paul Hoover | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Norris Hopper | — | Cincinnati Reds | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Billy Koch | — | Toronto Blue Jays | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Josias Manzanillo | — | Boston Red Sox | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Julio Mosquera | — | Milwaukee Brewers | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Shane Nance | — | Arizona Diamondbacks | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Matt Perisho | — | Florida Marlins | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Brian Sweeney | — | Tampa Bay Devil Rays | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Luis Ugueto | — | Kansas City Royals | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Dusty Wathan | — | Cleveland Indians | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Gerald Williams | — | New York Mets | Free agent signing |
| Jan 10, 2005 | Signed as free agent | Jason Wood | — | Florida Marlins | Free agent signing |
| Jan 10, 2005 | Trade | Travis Hinton | Milwaukee Brewers | Chicago White Sox | Trade |
| Jan 8, 2005 | Signed as free agent | Adam Bernero | — | Atlanta Braves | Free agent signing |
| Jan 8, 2005 | Signed as free agent | Doug Creek | — | Detroit Tigers | Free agent signing |
| Jan 8, 2005 | Signed as free agent | Steve Green | — | Cleveland Indians | Free agent signing |
| Jan 8, 2005 | Signed as free agent | Michel Hernandez | — | San Diego Padres | Free agent signing |
| Jan 8, 2005 | Signed as free agent | Kevin Millwood | — | Cleveland Indians | Free agent signing |
| Jan 8, 2005 | Signed as free agent | Chad Mottola | — | Toronto Blue Jays | Free agent signing |
| Jan 8, 2005 | Signed as free agent | Chris Stynes | — | Baltimore Orioles | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Marlon Anderson | — | New York Mets | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Robinson Cancel | — | Chicago Cubs | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Jack Cressend | — | Boston Red Sox | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Mike Hessman | — | Detroit Tigers | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Warren Morris | — | Cleveland Indians | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Odalis Perez | — | Los Angeles Dodgers | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Santiago Perez | — | Cincinnati Reds | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Adam Riggs | — | Houston Astros | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Kerry Robinson | — | New York Mets | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Turk Wendell | — | Houston Astros | Free agent signing |
| Jan 7, 2005 | Signed as free agent | Gabe White | — | Atlanta Braves | Free agent signing |
| Jan 6, 2005 | Signed as free agent | John Barnes | — | Atlanta Braves | Free agent signing |
| Jan 6, 2005 | Signed as free agent | Andrew Good | — | Detroit Tigers | Free agent signing |
| Jan 6, 2005 | Signed as free agent | Mark Grudzielanek | — | St. Louis Cardinals | Free agent signing |
| Jan 6, 2005 | Signed as free agent | Ken Huckaby | — | Toronto Blue Jays | Free agent signing |
| Jan 6, 2005 | Signed as free agent | Graham Koonce | — | Pittsburgh Pirates | Free agent signing |
| Jan 6, 2005 | Signed as free agent | Dustan Mohr | — | Colorado Rockies | Free agent signing |
| Jan 6, 2005 | Signed as free agent | A. J. Pierzynski | — | Chicago White Sox | Free agent signing |
| Jan 6, 2005 | Signed as free agent | Dan Reichert | — | Seattle Mariners | Free agent signing |
| Jan 6, 2005 | Signed as free agent | Desi Relaford | — | Colorado Rockies | Free agent signing |
| Jan 6, 2005 | Signed as free agent | John Riedling | — | Florida Marlins | Free agent signing |
| Jan 6, 2005 | Signed as free agent | Mike Rivera | — | Detroit Tigers | Free agent signing |
| Jan 6, 2005 | Signed as free agent | Ismael Valdez | — | Florida Marlins | Free agent signing |
| Jan 6, 2005 | Signed as free agent | Gregg Zaun | — | Toronto Blue Jays | Free agent signing |
| Jan 5, 2005 | Signed as free agent | Moises Alou | — | San Francisco Giants | Free agent signing |
| Jan 5, 2005 | Signed as free agent | Charles Gipson | — | Houston Astros | Free agent signing |
| Jan 5, 2005 | Signed as free agent | Todd Greene | — | Colorado Rockies | Free agent signing |
| Jan 5, 2005 | Signed as free agent | Ramon Martinez | — | Detroit Tigers | Free agent signing |
| Jan 5, 2005 | Signed as free agent | Phil Norton | — | Houston Astros | Free agent signing |
| Jan 5, 2005 | Signed as free agent | Carlos Rivera | — | Houston Astros | Free agent signing |
| Jan 5, 2005 | Signed as free agent | Matt White | — | Washington Nationals | Free agent signing |
| Jan 5, 2005 | Signed as free agent | Ed Yarnall | — | Washington Nationals | Free agent signing |
| Jan 5, 2005 | Trade | Vance Wilson | New York Mets | Detroit Tigers | Trade |
| Jan 5, 2005 | Trade | Anderson Hernandez | Detroit Tigers | New York Mets | Trade |
| Jan 4, 2005 | Released | Jamie Brown | Boston Red Sox | — | Release |
| Jan 4, 2005 | Released | Jolbert Cabrera | Seattle Mariners | — | Release |
| Jan 4, 2005 | Signed as free agent | Mark DiFelice | — | Washington Nationals | Free agent signing |
| Jan 4, 2005 | Signed as free agent | Andy Fox | — | Minnesota Twins | Free agent signing |
| Jan 4, 2005 | Signed as free agent | Pokey Reese | — | Seattle Mariners | Free agent signing |
| Jan 4, 2005 | Signed as free agent | Jorge Toca | — | Chicago White Sox | Free agent signing |
| Jan 3, 2005 | Signed as free agent | Brent Abernathy | — | Minnesota Twins | Free agent signing |
| Jan 3, 2005 | Signed as free agent | Orlando Hernandez | — | Chicago White Sox | Free agent signing |
| Jan 3, 2005 | Signed as free agent | Mike Kinkade | — | Cleveland Indians | Free agent signing |
| Jan 3, 2005 | Signed as free agent | George Lombard | — | Boston Red Sox | Free agent signing |
| Jan 1, 2005 | Signed as free agent | Tino Martinez | — | New York Yankees | Free agent signing |
| before the 2005 season | Signed as free agent | Mike Bynum | — | Detroit Tigers | Free agent signing |
| before the 2005 season | Released | Jayson Durocher | Toronto Blue Jays | — | Release |
Every row is mapped onto the same trade / signing / release vocabulary the modern feed uses, with the era’s own type description kept on each row. Club names are the names of the day (the Boston Braves years, the Brooklyn Dodgers years), and each links to the franchise it is today. Some dates are only partially known or flagged approximate by the source; they are shown exactly as published, never completed to a fake precise day.