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The 1979 season’s official transaction log: 391 trades, signings and releases involving major-league clubs, listed newest first.
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Dec 21, 1979 | Trade | Larry Andersen | Cleveland Indians | Pittsburgh Pirates | Trade |
| Dec 21, 1979 | Trade | Larry Littleton | Pittsburgh Pirates | Cleveland Indians | Trade |
| Dec 21, 1979 | Trade | John Burden | Pittsburgh Pirates | Cleveland Indians | Trade |
| Dec 20, 1979 | Signed as free agent | Willie Horton | — | Seattle Mariners | Free agent signing |
| Dec 20, 1979 | Signed | Jerry Willard | — | Philadelphia Phillies | Amateur free agent signing |
| Dec 19, 1979 | Released | Rob Andrews | San Francisco Giants | — | Release |
| Dec 19, 1979 | Signed as free agent | Jorge Orta | — | Cleveland Indians | Free agent signing |
| Dec 18, 1979 | Released | Jack Kucek | Philadelphia Phillies | — | Release |
| Dec 13, 1979 | Signed as free agent | Greg Gross | — | Philadelphia Phillies | Free agent signing |
| Dec 13, 1979 | Trade | Amos Lewis | New York Yankees | Texas Rangers | Trade |
| Dec 13, 1979 | Trade | Ricky Burdette | New York Yankees | Texas Rangers | Trade |
| Dec 12, 1979 | Signed as free agent | Milt May | — | San Francisco Giants | Free agent signing |
| Dec 12, 1979 | Released | Jim Nettles | Kansas City Royals | — | Release |
| Dec 12, 1979 | Signed as free agent | Rennie Stennett | — | San Francisco Giants | Free agent signing |
| Dec 12, 1979 | Signed as free agent | Jim Wohlford | — | San Francisco Giants | Free agent signing |
| Dec 11, 1979 | Released | Bob Apodaca | New York Mets | — | Release |
| Dec 10, 1979 | Trade | Jody Davis | New York Mets | St. Louis Cardinals | Trade |
| Dec 10, 1979 | Trade | Ray Searage | St. Louis Cardinals | New York Mets | Trade |
| Dec 7, 1979 | Trade | Paul Thormodsgard | Minnesota Twins | Philadelphia Phillies | Trade |
| Dec 7, 1979 | Trade | Pete Mackanin | Philadelphia Phillies | Minnesota Twins | Trade |
| Dec 7, 1979 | Trade | Bobby Bonds | Cleveland Indians | St. Louis Cardinals | Trade |
| Dec 7, 1979 | Trade | Jerry Mumphrey | St. Louis Cardinals | Cleveland Indians | Trade |
| Dec 7, 1979 | Trade | John Denny | St. Louis Cardinals | Cleveland Indians | Trade |
| Dec 7, 1979 | Trade | Ron LeFlore | Detroit Tigers | Montreal Expos | Trade |
| Dec 7, 1979 | Trade | Dan Schatzeder | Montreal Expos | Detroit Tigers | Trade |
| Dec 7, 1979 | Trade | Dan Graham | Minnesota Twins | Baltimore Orioles | Trade |
| Dec 7, 1979 | Trade | Tom Chism | Baltimore Orioles | Minnesota Twins | Trade |
| Dec 6, 1979 | Signed as free agent | Rowland Office | — | Montreal Expos | Free agent signing |
| Dec 6, 1979 | Trade | Unnamed | Texas Rangers | Atlanta Braves | $50000 |
| Dec 6, 1979 | Trade | Doyle Alexander | Texas Rangers | Atlanta Braves | Trade |
| Dec 6, 1979 | Trade | Larvell Blanks | Texas Rangers | Atlanta Braves | Trade |
| Dec 6, 1979 | Trade | Adrian Devine | Atlanta Braves | Texas Rangers | Trade |
| Dec 6, 1979 | Trade | Pepe Frias | Atlanta Braves | Texas Rangers | Trade |
| Dec 6, 1979 | Trade | Lenn Sakata | Milwaukee Brewers | Baltimore Orioles | Trade |
| Dec 6, 1979 | Trade | John Flinn | Baltimore Orioles | Milwaukee Brewers | Trade |
| Dec 6, 1979 | Trade | Al Cowens | Kansas City Royals | California Angels | Trade |
| Dec 6, 1979 | Trade | Todd Cruz | Kansas City Royals | California Angels | Trade |
| Dec 6, 1979 | Trade | Rance Mulliniks | California Angels | Kansas City Royals | Trade |
| Dec 6, 1979 | Trade | Willie Aikens | California Angels | Kansas City Royals | Trade |
| Dec 6, 1979 | Trade | Rafael Vasquez | Seattle Mariners | Cleveland Indians | Trade |
| Dec 6, 1979 | Trade | Rob Pietroburgo | Seattle Mariners | Cleveland Indians | Trade |
| Dec 6, 1979 | Trade | Ted Cox | Cleveland Indians | Seattle Mariners | Trade |
| Dec 5, 1979 | Signed as free agent | Freddie Patek | — | California Angels | Free agent signing |
| Dec 5, 1979 | Trade | Jim Anderson | California Angels | Seattle Mariners | Trade |
| Dec 5, 1979 | Trade | Chris Chambliss | Toronto Blue Jays | Atlanta Braves | Trade |
| Dec 5, 1979 | Trade | Luis Gomez | Toronto Blue Jays | Atlanta Braves | Trade |
| Dec 5, 1979 | Trade | Barry Bonnell | Atlanta Braves | Toronto Blue Jays | Trade |
| Dec 5, 1979 | Trade | Pat Rockett | Atlanta Braves | Toronto Blue Jays | Trade |
| Dec 5, 1979 | Trade | Joey McLaughlin | Atlanta Braves | Toronto Blue Jays | Trade |
| Dec 5, 1979 | Trade | Jeff Holly | Minnesota Twins | Detroit Tigers | Trade |
| Dec 5, 1979 | Trade | Fernando Arroyo | Detroit Tigers | Minnesota Twins | Trade |
| Dec 4, 1979 | Signed as free agent | Jay Johnstone | — | Los Angeles Dodgers | Free agent signing |
| Dec 3, 1979 | Signed as free agent | Fred Norman | — | Montreal Expos | Free agent signing |
| Dec 3, 1979 | Trade | Randall Schafer | Montreal Expos | Detroit Tigers | Trade |
| Dec 3, 1979 | Trade | Bill Nahorodny | Chicago White Sox | Atlanta Braves | Trade |
| Dec 3, 1979 | Trade | Richard Wieters | Atlanta Braves | Chicago White Sox | Trade |
| Nov 28, 1979 | Released | Vic Davalillo | Los Angeles Dodgers | — | Release |
| Nov 27, 1979 | Signed as free agent | Skip Lockwood | — | Boston Red Sox | Free agent signing |
| Nov 27, 1979 | Trade | Bill Almon | San Diego Padres | Montreal Expos | Trade |
| Nov 27, 1979 | Trade | Dan Briggs | San Diego Padres | Montreal Expos | Trade |
| Nov 27, 1979 | Trade | Dave Cash | Montreal Expos | San Diego Padres | Trade |
| Nov 26, 1979 | Signed as free agent | John Curtis | — | San Diego Padres | Free agent signing |
| Nov 24, 1979 | Signed | Cecilio Guante | — | Pittsburgh Pirates | Amateur free agent signing |
| Nov 21, 1979 | Signed as free agent | Andy Hassler | — | Pittsburgh Pirates | Free agent signing |
| Nov 21, 1979 | Signed | Julio Solano | — | Houston Astros | Amateur free agent signing |
| Nov 20, 1979 | Signed as free agent | Al Hrabosky | — | Atlanta Braves | Free agent signing |
| Nov 19, 1979 | Signed as free agent | Nolan Ryan | — | Houston Astros | Free agent signing |
| Nov 19, 1979 | Signed as free agent | Rick Wise | — | San Diego Padres | Free agent signing |
| Nov 17, 1979 | Signed as free agent | Don Stanhouse | — | Los Angeles Dodgers | Free agent signing |
| Nov 16, 1979 | Signed as free agent | Bruce Kison | — | California Angels | Free agent signing |
| Nov 16, 1979 | Signed as free agent | Tony Perez | — | Boston Red Sox | Free agent signing |
| Nov 14, 1979 | Signed as free agent | Dave Goltz | — | Los Angeles Dodgers | Free agent signing |
| Nov 14, 1979 | Released | Art Kusnyer | Chicago White Sox | — | Release |
| Nov 14, 1979 | Trade | Unnamed | New York Yankees | Texas Rangers | $ |
| Nov 14, 1979 | Trade | Eric Soderholm | Texas Rangers | New York Yankees | Trade |
| Nov 8, 1979 | Signed as free agent | Rudy May | — | New York Yankees | Free agent signing |
| Nov 8, 1979 | Signed as free agent | Bob Watson | — | New York Yankees | Free agent signing |
| Nov 7, 1979 | Released | Tim McCarver | Philadelphia Phillies | — | Release |
| Nov 5, 1979 | Released | Dave McKay | Toronto Blue Jays | — | Release |
| Nov 1, 1979 | Trade | Ruppert Jones | Seattle Mariners | New York Yankees | Trade |
| Nov 1, 1979 | Trade | Jim Lewis | Seattle Mariners | New York Yankees | Trade |
| Nov 1, 1979 | Trade | Jim Beattie | New York Yankees | Seattle Mariners | Trade |
| Nov 1, 1979 | Trade | Rick Anderson | New York Yankees | Seattle Mariners | Trade |
| Nov 1, 1979 | Trade | Juan Beniquez | New York Yankees | Seattle Mariners | Trade |
| Nov 1, 1979 | Trade | Jerry Narron | New York Yankees | Seattle Mariners | Trade |
| Nov 1, 1979 | Trade | Tom Underwood | Toronto Blue Jays | New York Yankees | Trade |
| Nov 1, 1979 | Trade | Rick Cerone | Toronto Blue Jays | New York Yankees | Trade |
| Nov 1, 1979 | Trade | Ted Wilborn | Toronto Blue Jays | New York Yankees | Trade |
| Nov 1, 1979 | Trade | Chris Chambliss | New York Yankees | Toronto Blue Jays | Trade |
| Nov 1, 1979 | Trade | Damaso Garcia | New York Yankees | Toronto Blue Jays | Trade |
| Nov 1, 1979 | Trade | Paul Mirabella | New York Yankees | Toronto Blue Jays | Trade |
| Oct 31, 1979 | Trade | Jerry Morales | Detroit Tigers | New York Mets | Trade |
| Oct 31, 1979 | Trade | Phil Mankowski | Detroit Tigers | New York Mets | Trade |
| Oct 31, 1979 | Trade | Richie Hebner | New York Mets | Detroit Tigers | Trade |
| Oct 26, 1979 | Released | Steve Mingori | Kansas City Royals | — | Release |
| Oct 26, 1979 | Trade | Keith Drumright | Houston Astros | Kansas City Royals | Trade |
| Oct 26, 1979 | Trade | Mark Bomback | Milwaukee Brewers | New York Mets | Trade |
| Oct 26, 1979 | Trade | Dwight Bernard | New York Mets | Milwaukee Brewers | Trade |
| Oct 25, 1979 | Trade | Sheldon Burnside | Detroit Tigers | Cincinnati Reds | Trade |
| Oct 24, 1979 | Released | Paul Reuschel | Cleveland Indians | — | Release |
| Oct 24, 1979 | Trade | Dyar Miller | Toronto Blue Jays | Montreal Expos | Trade |
| Oct 24, 1979 | Trade | Lance Rautzhan | Milwaukee Brewers | Kansas City Royals | Trade |
| Oct 24, 1979 | Trade | Kevin Gillen | Kansas City Royals | Milwaukee Brewers | Trade |
| Oct 23, 1979 | Trade | Mike Jorgensen | Texas Rangers | New York Mets | Trade |
| Oct 23, 1979 | Trade | Mike O'Berry | Boston Red Sox | Chicago Cubs | Trade |
| Oct 22, 1979 | Released | Dave Freisleben | Toronto Blue Jays | — | Release |
| Oct 22, 1979 | Released | Craig Kusick | Toronto Blue Jays | — | Release |
| Oct 19, 1979 | Released | Bobby Tolan | San Diego Padres | — | Release |
| Oct 17, 1979 | Trade | Mike Tyson | St. Louis Cardinals | Chicago Cubs | Trade |
| Oct 17, 1979 | Trade | Donnie Moore | Chicago Cubs | St. Louis Cardinals | Trade |
| Oct 16, 1979 | Released | Darrel Chaney | Atlanta Braves | — | Release |
| Oct 15, 1979 | Signed as free agent | Tom Johnson | — | Chicago White Sox | Free agent signing |
| Oct 14, 1979 | Signed | Tony Brewer | — | Los Angeles Dodgers | Amateur free agent signing |
| Oct 12, 1979 | Trade | Mark Gilbert | Chicago Cubs | Cincinnati Reds | Trade |
| Oct 11, 1979 | Signed | Juan Castillo | — | Milwaukee Brewers | Amateur free agent signing |
| Oct 8, 1979 | Trade | Ray Fontenot | Texas Rangers | New York Yankees | Trade |
| Oct 8, 1979 | Trade | Gene Nelson | Texas Rangers | New York Yankees | Trade |
| Oct 8, 1979 | Trade | Bob Polinsky | New York Yankees | Texas Rangers | Trade |
| Oct 8, 1979 | Trade | Neal Mersch | New York Yankees | Texas Rangers | Trade |
| Oct 8, 1979 | Trade | Mark Softy | New York Yankees | Texas Rangers | Trade |
| Oct 4, 1979 | Released | Bill Plummer | Seattle Mariners | — | Release |
| Oct 3, 1979 | Released | Ken Holtzman | Chicago Cubs | — | Release |
| Oct 3, 1979 | Released | Mickey Lolich | San Diego Padres | — | Release |
| Oct 1, 1979 | Released | Manny Mota | Los Angeles Dodgers | — | Release |
| Sep 18, 1979 | Trade | Ed Lynch | Texas Rangers | New York Mets | Trade |
| Sep 1, 1979 | Signed as free agent | Elrod Hendricks | — | Baltimore Orioles | Free agent signing |
| Aug 29, 1979 | Trade | John Montague | Seattle Mariners | California Angels | Trade |
| Aug 28, 1979 | Released | Andy Messersmith | Los Angeles Dodgers | — | Release |
| Aug 27, 1979 | Signed | Mike Kingery | — | Kansas City Royals | Amateur free agent signing |
| Aug 26, 1979 | Signed as free agent | George Scott | — | New York Yankees | Free agent signing |
| Aug 26, 1979 | Signed | Jeff Stone | — | Philadelphia Phillies | Amateur free agent signing |
| Aug 17, 1979 | Released | George Scott | Kansas City Royals | — | Release |
| Aug 17, 1979 | Trade | Unnamed | Boston Red Sox | Chicago Cubs | $ |
| Aug 17, 1979 | Trade | Ted Sizemore | Chicago Cubs | Boston Red Sox | Trade |
| Aug 12, 1979 | Trade | Willie Montanez | New York Mets | Texas Rangers | Trade |
| Aug 6, 1979 | Released | John Hale | Seattle Mariners | — | Release |
| Jul 31, 1979 | Released | Terry Humphrey | California Angels | — | Release |
| Jul 30, 1979 | Signed | Ivan Calderon | — | Seattle Mariners | Amateur free agent signing |
| Jul 30, 1979 | Trade | Tony Solaita | Montreal Expos | Toronto Blue Jays | Trade |
| Jul 30, 1979 | Trade | Oscar Gamble | Texas Rangers | New York Yankees | Trade |
| Jul 30, 1979 | Trade | Amos Lewis | Texas Rangers | New York Yankees | Trade |
| Jul 30, 1979 | Trade | Mickey Rivers | New York Yankees | Texas Rangers | Trade |
| Jul 25, 1979 | Trade | Mike Armstrong | Cincinnati Reds | San Diego Padres | Trade |
| Jul 25, 1979 | Trade | Paul O'Neill | San Diego Padres | Cincinnati Reds | Trade |
| Jul 20, 1979 | Trade | Unnamed | Montreal Expos | Detroit Tigers | $ |
| Jul 20, 1979 | Trade | Rusty Staub | Detroit Tigers | Montreal Expos | Trade |
| Jul 18, 1979 | Signed | Mike Madden | — | Milwaukee Brewers | Amateur free agent signing |
| Jul 18, 1979 | Signed as free agent | Mike Stanton | — | Cleveland Indians | Free agent signing |
| Jul 10, 1979 | Signed | Curt Kaufman | — | New York Yankees | Amateur free agent signing |
| Jul 10, 1979 | Trade | Jim Morrison | Philadelphia Phillies | Chicago White Sox | Trade |
| Jul 7, 1979 | Released | Pablo Torrealba | Chicago White Sox | — | Release |
| Jul 6, 1979 | Released | Keith Comstock | California Angels | — | Release |
| Jul 6, 1979 | Trade | Juan Bernhardt | Seattle Mariners | Chicago White Sox | Trade |
| Jul 6, 1979 | Trade | Rich Hinton | Chicago White Sox | Seattle Mariners | Trade |
| Jul 5, 1979 | Signed as free agent | Bobby Tolan | — | San Diego Padres | Free agent signing |
| Jun 28, 1979 | Trade | Hector Cruz | San Francisco Giants | Cincinnati Reds | Trade |
| Jun 28, 1979 | Trade | Pedro Borbon | Cincinnati Reds | San Francisco Giants | Trade |
| Jun 28, 1979 | Trade | Bill Madlock | San Francisco Giants | Pittsburgh Pirates | Trade |
| Jun 28, 1979 | Trade | Lenny Randle | San Francisco Giants | Pittsburgh Pirates | Trade |
| Jun 28, 1979 | Trade | Dave Roberts | San Francisco Giants | Pittsburgh Pirates | Trade |
| Jun 28, 1979 | Trade | Ed Whitson | Pittsburgh Pirates | San Francisco Giants | Trade |
| Jun 28, 1979 | Trade | Fred Breining | Pittsburgh Pirates | San Francisco Giants | Trade |
| Jun 28, 1979 | Trade | Al Holland | Pittsburgh Pirates | San Francisco Giants | Trade |
| Jun 27, 1979 | Released | Bob Robertson | Toronto Blue Jays | — | Release |
| Jun 26, 1979 | Signed | John Stefero | — | Baltimore Orioles | Amateur free agent signing |
| Jun 26, 1979 | Trade | Paul Semall | New York Yankees | Chicago Cubs | Trade |
| Jun 26, 1979 | Trade | Bobby Murcer | Chicago Cubs | New York Yankees | Trade |
| Jun 22, 1979 | Signed | Steve Senteney | — | Toronto Blue Jays | Amateur free agent signing |
| Jun 20, 1979 | Signed | Reggie Patterson | — | Chicago White Sox | Amateur free agent signing |
| Jun 19, 1979 | Trade | Bobby Sprowl | Boston Red Sox | Houston Astros | Trade |
| Jun 17, 1979 | Signed | Dan Gladden | — | San Francisco Giants | Amateur free agent signing |
| Jun 16, 1979 | Released | Jim Lonborg | Philadelphia Phillies | — | Release |
| Jun 15, 1979 | Signed | Rich Rodas | — | Los Angeles Dodgers | Amateur free agent signing |
| Jun 15, 1979 | Signed as free agent | Mark Souza | — | Oakland Athletics | Free agent signing |
| Jun 15, 1979 | Trade | Jay Johnstone | New York Yankees | San Diego Padres | Trade |
| Jun 15, 1979 | Trade | Dave Wehrmeister | San Diego Padres | New York Yankees | Trade |
| Jun 15, 1979 | Trade | Dock Ellis | Texas Rangers | New York Mets | Trade |
| Jun 15, 1979 | Trade | Bob Myrick | New York Mets | Texas Rangers | Trade |
| Jun 15, 1979 | Trade | Mike Bruhert | New York Mets | Texas Rangers | Trade |
| Jun 15, 1979 | Trade | Ed Farmer | Texas Rangers | Chicago White Sox | Trade |
| Jun 15, 1979 | Trade | Gary Holle | Texas Rangers | Chicago White Sox | Trade |
| Jun 15, 1979 | Trade | Eric Soderholm | Chicago White Sox | Texas Rangers | Trade |
| Jun 15, 1979 | Trade | Cliff Johnson | New York Yankees | Cleveland Indians | Trade |
| Jun 15, 1979 | Trade | Don Hood | Cleveland Indians | New York Yankees | Trade |
| Jun 15, 1979 | Trade | Unnamed | Texas Rangers | Oakland Athletics | $ |
| Jun 15, 1979 | Trade | Dave Chalk | Texas Rangers | Oakland Athletics | Trade |
| Jun 15, 1979 | Trade | Mike Heath | Texas Rangers | Oakland Athletics | Trade |
| Jun 15, 1979 | Trade | John Henry Johnson | Oakland Athletics | Texas Rangers | Trade |
| Jun 14, 1979 | Trade | Paul Dade | Cleveland Indians | San Diego Padres | Trade |
| Jun 14, 1979 | Trade | Mike Hargrove | San Diego Padres | Cleveland Indians | Trade |
| Jun 13, 1979 | Trade | Unnamed | Boston Red Sox | Houston Astros | $ |
| Jun 13, 1979 | Trade | Pete Ladd | Boston Red Sox | Houston Astros | Trade |
| Jun 13, 1979 | Trade | Bob Watson | Houston Astros | Boston Red Sox | Trade |
| Jun 13, 1979 | Trade | Unnamed | Montreal Expos | San Francisco Giants | $ |
| Jun 13, 1979 | Trade | John Tamargo | San Francisco Giants | Montreal Expos | Trade |
| Jun 13, 1979 | Trade | Tom Poquette | Kansas City Royals | Boston Red Sox | Trade |
| Jun 13, 1979 | Trade | George Scott | Boston Red Sox | Kansas City Royals | Trade |
| Jun 12, 1979 | Signed as free agent | Steve Stroughter | — | Seattle Mariners | Free agent signing |
| Jun 11, 1979 | Signed as free agent | Ken Brett | — | Los Angeles Dodgers | Free agent signing |
| Jun 7, 1979 | Trade | Paul Mitchell | Seattle Mariners | Milwaukee Brewers | Trade |
| Jun 7, 1979 | Trade | Randy Stein | Milwaukee Brewers | Seattle Mariners | Trade |
| Jun 6, 1979 | Trade | Randy Fierbaugh | San Diego Padres | Baltimore Orioles | Trade |
| Jun 6, 1979 | Trade | Dennis Blair | Baltimore Orioles | San Diego Padres | Trade |
| Jun 5, 1979 | Trade | Unnamed | California Angels | Baltimore Orioles | $ |
| Jun 5, 1979 | Trade | Floyd Rayford | California Angels | Baltimore Orioles | Trade |
| Jun 5, 1979 | Trade | Larry Harlow | Baltimore Orioles | California Angels | Trade |
| Jun 4, 1979 | Released | Ken Brett | Minnesota Twins | — | Release |
| May 25, 1979 | Signed as free agent | Bud Harrelson | — | Philadelphia Phillies | Free agent signing |
| May 25, 1979 | Trade | Champ Summers | Cincinnati Reds | Detroit Tigers | Trade |
| May 25, 1979 | Trade | Frank LaCorte | Atlanta Braves | Houston Astros | Trade |
| May 25, 1979 | Trade | Bo McLaughlin | Houston Astros | Atlanta Braves | Trade |
| May 23, 1979 | Trade | Dick Tidrow | New York Yankees | Chicago Cubs | Trade |
| May 23, 1979 | Trade | Ray Burris | Chicago Cubs | New York Yankees | Trade |
| May 22, 1979 | Released | Frank Duffy | Boston Red Sox | — | Release |
| May 21, 1979 | Signed as free agent | Tom Grieve | — | Texas Rangers | Free agent signing |
| May 20, 1979 | Signed | Mike Ramsey | — | Cincinnati Reds | Amateur free agent signing |
| May 16, 1979 | Signed as free agent | Nardi Contreras | — | Chicago White Sox | Free agent signing |
| May 16, 1979 | Signed as free agent | Lenny Randle | — | San Francisco Giants | Free agent signing |
| May 12, 1979 | Released | Tom Murphy | Toronto Blue Jays | — | Release |
| May 11, 1979 | Released | Gene Clines | Chicago Cubs | — | Release |
| May 10, 1979 | Released | Luis Aponte | Boston Red Sox | — | Release |
| May 9, 1979 | Released | Tom Grieve | St. Louis Cardinals | — | Release |
| May 8, 1979 | Signed as free agent | Paul Blair | — | Cincinnati Reds | Free agent signing |
| May 8, 1979 | Signed as free agent | Joe Coleman | — | Pittsburgh Pirates | Free agent signing |
| May 4, 1979 | Trade | Bert Campaneris | Texas Rangers | California Angels | Trade |
| May 4, 1979 | Trade | Dave Chalk | California Angels | Texas Rangers | Trade |
| May 3, 1979 | Trade | Doug Capilla | Cincinnati Reds | Chicago Cubs | Trade |
| Apr 30, 1979 | Signed as free agent | Ken Brett | — | Minnesota Twins | Free agent signing |
| Apr 27, 1979 | Trade | George Throop | Kansas City Royals | Houston Astros | Trade |
| Apr 24, 1979 | Signed | Tony Fernandez | — | Toronto Blue Jays | Amateur free agent signing |
| Apr 23, 1979 | Signed as free agent | Bob Robertson | — | Toronto Blue Jays | Free agent signing |
| Apr 21, 1979 | Released | Joe Coleman | San Francisco Giants | — | Release |
| Apr 19, 1979 | Signed | Curt Brown | — | California Angels | Amateur free agent signing |
| Apr 19, 1979 | Trade | Tim Foli | New York Mets | Pittsburgh Pirates | Trade |
| Apr 19, 1979 | Trade | Greg Field | New York Mets | Pittsburgh Pirates | Trade |
| Apr 19, 1979 | Trade | Frank Taveras | Pittsburgh Pirates | New York Mets | Trade |
| Apr 15, 1979 | Signed as free agent | Clay Carroll | — | Milwaukee Brewers | Free agent signing |
| Apr 15, 1979 | Signed | Jose Oquendo | — | New York Mets | Amateur free agent signing |
| Apr 13, 1979 | Released | Jackson Todd | Philadelphia Phillies | — | Release |
| Apr 13, 1979 | Signed as free agent | Jackson Todd | — | Toronto Blue Jays | Free agent signing |
| Apr 13, 1979 | Trade | Jack Kucek | Chicago White Sox | Philadelphia Phillies | Trade |
| Apr 12, 1979 | Released | Paul Blair | New York Yankees | — | Release |
| Apr 10, 1979 | Signed as free agent | Bobby Valentine | — | Seattle Mariners | Free agent signing |
| Apr 9, 1979 | Signed as free agent | Rod Gilbreath | — | Pittsburgh Pirates | Free agent signing |
| Apr 7, 1979 | Signed as free agent | Sam Perlozzo | — | San Diego Padres | Free agent signing |
| Apr 7, 1979 | Trade | Rick Rhoden | Los Angeles Dodgers | Pittsburgh Pirates | Trade |
| Apr 7, 1979 | Trade | Jerry Reuss | Pittsburgh Pirates | Los Angeles Dodgers | Trade |
| Apr 6, 1979 | Signed as free agent | Mike Sember | — | Toronto Blue Jays | Free agent signing |
| Apr 5, 1979 | Signed as free agent | Dell Alston | — | Cleveland Indians | Free agent signing |
| Apr 5, 1979 | Released | Paul Siebert | St. Louis Cardinals | — | Release |
| Apr 5, 1979 | Signed as free agent | Charlie Spikes | — | Atlanta Braves | Free agent signing |
| Apr 5, 1979 | Released | Steve Stroughter | California Angels | — | Release |
| Apr 4, 1979 | Released | Pete Broberg | Los Angeles Dodgers | — | Release |
| Apr 4, 1979 | Signed as free agent | Tom Griffin | — | San Francisco Giants | Free agent signing |
| Apr 4, 1979 | Signed as free agent | Wayne Twitchell | — | New York Mets | Free agent signing |
| Apr 3, 1979 | Released | Buzz Capra | Atlanta Braves | — | Release |
| Apr 3, 1979 | Trade | Mike Champion | San Diego Padres | Cleveland Indians | Trade |
| Apr 3, 1979 | Trade | Doug Bird | Kansas City Royals | Philadelphia Phillies | Trade |
| Apr 3, 1979 | Trade | Todd Cruz | Philadelphia Phillies | Kansas City Royals | Trade |
| Apr 2, 1979 | Released | Ken Brett | California Angels | — | Release |
| Apr 1, 1979 | Signed as free agent | Joe Coleman | — | San Francisco Giants | Free agent signing |
| Mar 31, 1979 | Trade | Pepe Frias | Montreal Expos | Atlanta Braves | Trade |
| Mar 31, 1979 | Trade | Dave Campbell | Atlanta Braves | Montreal Expos | Trade |
| Mar 30, 1979 | Released | Ron Blomberg | Chicago White Sox | — | Release |
| Mar 30, 1979 | Released | Mike Garman | Montreal Expos | — | Release |
| Mar 30, 1979 | Released | Rod Gilbreath | Atlanta Braves | — | Release |
| Mar 30, 1979 | Released | Sam Perlozzo | Minnesota Twins | — | Release |
| Mar 30, 1979 | Signed as free agent | Danny Walton | — | Seattle Mariners | Free agent signing |
| Mar 30, 1979 | Released | Jim Willoughby | St. Louis Cardinals | — | Release |
| Mar 30, 1979 | Signed as free agent | Jim Willoughby | — | Chicago Cubs | Free agent signing |
| Mar 30, 1979 | Trade | Dan Briggs | Cleveland Indians | San Diego Padres | Trade |
| Mar 29, 1979 | Released | Jeff Byrd | Toronto Blue Jays | — | Release |
| Mar 29, 1979 | Released | Nardi Contreras | Philadelphia Phillies | — | Release |
| Mar 29, 1979 | Released | Don Kirkwood | Toronto Blue Jays | — | Release |
| Mar 29, 1979 | Released | Lenny Randle | New York Mets | — | Release |
| Mar 29, 1979 | Signed as free agent | Del Unser | — | Philadelphia Phillies | Free agent signing |
| Mar 28, 1979 | Released | Jim Colborn | Seattle Mariners | — | Release |
| Mar 28, 1979 | Released | Tom House | Seattle Mariners | — | Release |
| Mar 28, 1979 | Released | Kevin Pasley | Seattle Mariners | — | Release |
| Mar 28, 1979 | Released | Mike Sember | Chicago Cubs | — | Release |
| Mar 28, 1979 | Released | Bobby Thompson | Seattle Mariners | — | Release |
| Mar 28, 1979 | Trade | Gary Beare | Milwaukee Brewers | Philadelphia Phillies | Trade |
| Mar 28, 1979 | Trade | Dan Boitano | Philadelphia Phillies | Milwaukee Brewers | Trade |
| Mar 27, 1979 | Signed as free agent | Willie Davis | — | California Angels | Free agent signing |
| Mar 27, 1979 | Released | Paul Lindblad | Seattle Mariners | — | Release |
| Mar 27, 1979 | Signed as free agent | Rudy Meoli | — | Philadelphia Phillies | Free agent signing |
| Mar 27, 1979 | Released | Dan Warthen | Houston Astros | — | Release |
| Mar 27, 1979 | Trade | Sheldon Mallory | Toronto Blue Jays | Cleveland Indians | Trade |
| Mar 27, 1979 | Trade | Nino Espinosa | New York Mets | Philadelphia Phillies | Trade |
| Mar 27, 1979 | Trade | Richie Hebner | Philadelphia Phillies | New York Mets | Trade |
| Mar 27, 1979 | Trade | Jose Moreno | Philadelphia Phillies | New York Mets | Trade |
| Mar 26, 1979 | Released | Elrod Hendricks | Baltimore Orioles | — | Release |
| Mar 26, 1979 | Released | Roger Moret | Texas Rangers | — | Release |
| Mar 26, 1979 | Released | Bobby Valentine | New York Mets | — | Release |
| Mar 25, 1979 | Released | Randy Elliott | Cleveland Indians | — | Release |
| Mar 24, 1979 | Released | Tom Brown | Seattle Mariners | — | Release |
| Mar 24, 1979 | Released | Dick Pole | Seattle Mariners | — | Release |
| Mar 24, 1979 | Trade | Ed Putman | Chicago Cubs | Detroit Tigers | Trade |
| Mar 23, 1979 | Released | Dell Alston | Oakland Athletics | — | Release |
| Mar 23, 1979 | Released | Frank MacCormack | Seattle Mariners | — | Release |
| Mar 20, 1979 | Trade | Luis Delgado | Seattle Mariners | Chicago Cubs | Trade |
| Mar 20, 1979 | Trade | Larry Cox | Chicago Cubs | Seattle Mariners | Trade |
| Mar 20, 1979 | Trade | Steve Dillard | Detroit Tigers | Chicago Cubs | Trade |
| Mar 19, 1979 | Released | Dave May | Philadelphia Phillies | — | Release |
| Mar 19, 1979 | Released | Butch Metzger | Philadelphia Phillies | — | Release |
| Mar 17, 1979 | Signed as free agent | Steve Luebber | — | Toronto Blue Jays | Free agent signing |
| Mar 17, 1979 | Signed | Ed Nunez | — | Seattle Mariners | Amateur free agent signing |
| Mar 15, 1979 | Signed as free agent | Billy Baldwin | — | Cleveland Indians | Free agent signing |
| Mar 15, 1979 | Trade | Unnamed | Pittsburgh Pirates | Boston Red Sox | $ |
| Mar 15, 1979 | Trade | Mike Easler | Boston Red Sox | Pittsburgh Pirates | Trade |
| Mar 15, 1979 | Trade | George Hill | Pittsburgh Pirates | Boston Red Sox | Trade |
| Mar 15, 1979 | Trade | Martin Rivas | Pittsburgh Pirates | Boston Red Sox | Trade |
| Mar 13, 1979 | Trade | Ed Glynn | Detroit Tigers | New York Mets | Trade |
| Mar 13, 1979 | Trade | Mardie Cornejo | New York Mets | Detroit Tigers | Trade |
| Mar 10, 1979 | Signed as free agent | Bernie Carbo | — | St. Louis Cardinals | Free agent signing |
| Mar 10, 1979 | Signed as free agent | Bill North | — | San Francisco Giants | Free agent signing |
| Mar 7, 1979 | Signed | Bob Gibson | — | Milwaukee Brewers | Amateur free agent signing |
| Mar 6, 1979 | Signed as free agent | Vic Harris | — | Milwaukee Brewers | Free agent signing |
| Mar 5, 1979 | Signed as free agent | Mike Anderson | — | Philadelphia Phillies | Free agent signing |
| Mar 5, 1979 | Signed as free agent | Brent Strom | — | Houston Astros | Free agent signing |
| Mar 1, 1979 | Signed as free agent | Fred Kuhaulua | — | San Diego Padres | Free agent signing |
| Feb 28, 1979 | Signed as free agent | Dave Hamilton | — | Oakland Athletics | Free agent signing |
| Feb 28, 1979 | Signed as free agent | Jim Todd | — | Oakland Athletics | Free agent signing |
| Feb 25, 1979 | Signed as free agent | Al Fitzmorris | — | San Diego Padres | Free agent signing |
| Feb 24, 1979 | Signed | Bill Bordley | — | San Francisco Giants | Amateur free agent signing |
| Feb 24, 1979 | Signed as free agent | Art Kusnyer | — | Chicago White Sox | Free agent signing |
| Feb 23, 1979 | Signed as free agent | Pete Broberg | — | Los Angeles Dodgers | Free agent signing |
| Feb 23, 1979 | Trade | Manny Trillo | Chicago Cubs | Philadelphia Phillies | Trade |
| Feb 23, 1979 | Trade | Dave Rader | Chicago Cubs | Philadelphia Phillies | Trade |
| Feb 23, 1979 | Trade | Greg Gross | Chicago Cubs | Philadelphia Phillies | Trade |
| Feb 23, 1979 | Trade | Barry Foote | Philadelphia Phillies | Chicago Cubs | Trade |
| Feb 23, 1979 | Trade | Ted Sizemore | Philadelphia Phillies | Chicago Cubs | Trade |
| Feb 23, 1979 | Trade | Jerry Martin | Philadelphia Phillies | Chicago Cubs | Trade |
| Feb 23, 1979 | Trade | Derek Botelho | Philadelphia Phillies | Chicago Cubs | Trade |
| Feb 23, 1979 | Trade | Henry Mack | Philadelphia Phillies | Chicago Cubs | Trade |
| Feb 22, 1979 | Signed as free agent | Fred Kendall | — | San Diego Padres | Free agent signing |
| Feb 22, 1979 | Signed as free agent | Dave Roberts | — | San Francisco Giants | Free agent signing |
| Feb 20, 1979 | Signed as free agent | Fred Holdsworth | — | Detroit Tigers | Free agent signing |
| Feb 19, 1979 | Signed as free agent | Will McEnaney | — | St. Louis Cardinals | Free agent signing |
| Feb 15, 1979 | Released | Jose Baez | St. Louis Cardinals | — | Release |
| Feb 15, 1979 | Signed as free agent | Mike Lum | — | Atlanta Braves | Free agent signing |
| Feb 15, 1979 | Trade | Gary Thomasson | New York Yankees | Los Angeles Dodgers | Trade |
| Feb 15, 1979 | Trade | Brad Gulden | Los Angeles Dodgers | New York Yankees | Trade |
| Feb 14, 1979 | Released | Art Kusnyer | Kansas City Royals | — | Release |
| Feb 13, 1979 | Released | Rich Chiles | Minnesota Twins | — | Release |
| Feb 13, 1979 | Released | Stan Perzanowski | Minnesota Twins | — | Release |
| Feb 13, 1979 | Released | Wayne Twitchell | Montreal Expos | — | Release |
| Feb 12, 1979 | Trade | Tommy Toms | St. Louis Cardinals | Texas Rangers | Trade |
| Feb 12, 1979 | Trade | Keith Smith | Texas Rangers | St. Louis Cardinals | Trade |
| Feb 8, 1979 | Released | Tom Johnson | Minnesota Twins | — | Release |
| Feb 8, 1979 | Released | Jim Todd | Seattle Mariners | — | Release |
| Feb 7, 1979 | Signed as free agent | Steve Brye | — | San Diego Padres | Free agent signing |
| Feb 7, 1979 | Signed as free agent | Andy Messersmith | — | Los Angeles Dodgers | Free agent signing |
| Feb 7, 1979 | Trade | Jesse Orosco | Minnesota Twins | New York Mets | Trade |
| Feb 3, 1979 | Trade | Rod Carew | Minnesota Twins | California Angels | Trade |
| Feb 3, 1979 | Trade | Ken Landreaux | California Angels | Minnesota Twins | Trade |
| Feb 3, 1979 | Trade | Dave Engle | California Angels | Minnesota Twins | Trade |
| Feb 3, 1979 | Trade | Paul Hartzell | California Angels | Minnesota Twins | Trade |
| Feb 3, 1979 | Trade | Brad Havens | California Angels | Minnesota Twins | Trade |
| Feb 3, 1979 | Trade | Dave Coleman | Boston Red Sox | Minnesota Twins | Trade |
| Feb 3, 1979 | Trade | Larry Wolfe | Minnesota Twins | Boston Red Sox | Trade |
| Feb 1, 1979 | Signed as free agent | Bill Plummer | — | Seattle Mariners | Free agent signing |
| Jan 30, 1979 | Signed as free agent | Al Bumbry | — | Baltimore Orioles | Free agent signing |
| Jan 29, 1979 | Released | Bob Jones | California Angels | — | Release |
| Jan 29, 1979 | Released | Bob Robertson | Seattle Mariners | — | Release |
| Jan 27, 1979 | Signed as free agent | Jim Colborn | — | Seattle Mariners | Free agent signing |
| Jan 27, 1979 | Signed as free agent | Willie Horton | — | Seattle Mariners | Free agent signing |
| Jan 26, 1979 | Signed as free agent | Alan Wiggins | — | Los Angeles Dodgers | Free agent signing |
| Jan 25, 1979 | Trade | John Stuper | Pittsburgh Pirates | St. Louis Cardinals | Trade |
| Jan 25, 1979 | Trade | Tommy Sandt | St. Louis Cardinals | Pittsburgh Pirates | Trade |
| Jan 21, 1979 | Signed | Larry Pashnick | — | Detroit Tigers | Amateur free agent signing |
| Jan 20, 1979 | Signed as free agent | Steve Waterbury | — | Chicago Cubs | Free agent signing |
| Jan 19, 1979 | Signed | Andres Galarraga | — | Montreal Expos | Amateur free agent signing |
| Jan 19, 1979 | Signed | Dave Hudgens | — | Cleveland Indians | Amateur free agent signing |
| Jan 19, 1979 | Signed as free agent | Lee Lacy | — | Pittsburgh Pirates | Free agent signing |
| Jan 19, 1979 | Signed as free agent | Steve Renko | — | Boston Red Sox | Free agent signing |
| Jan 17, 1979 | Released | Nelson Briles | Baltimore Orioles | — | Release |
| Jan 17, 1979 | Released | Fred Holdsworth | Montreal Expos | — | Release |
| Jan 16, 1979 | Signed as free agent | Darold Knowles | — | St. Louis Cardinals | Free agent signing |
| Jan 16, 1979 | Trade | Mike Dimmel | Baltimore Orioles | St. Louis Cardinals | Trade |
| Jan 16, 1979 | Trade | Benny Ayala | St. Louis Cardinals | Baltimore Orioles | Trade |
| Jan 15, 1979 | Signed as free agent | Tom Paciorek | — | Seattle Mariners | Free agent signing |
| Jan 11, 1979 | Signed as free agent | Rico Carty | — | Toronto Blue Jays | Free agent signing |
| Jan 8, 1979 | Signed as free agent | Elias Sosa | — | Montreal Expos | Free agent signing |
| Jan 6, 1979 | Signed as free agent | Mike Marshall | — | Minnesota Twins | Free agent signing |
| Jan 4, 1979 | Signed as free agent | Chuck Scrivener | — | Toronto Blue Jays | Free agent signing |
| before the 1979 season | Released | Billy Baldwin | New York Mets | — | Release |
| before the 1979 season | Signed as free agent | Buzz Capra | — | Atlanta Braves | Free agent signing |
| before the 1979 season | Signed | Luis Leal | — | Toronto Blue Jays | Amateur free agent signing |
| before the 1979 season | Signed as free agent | Dave May | — | Philadelphia Phillies | Free agent signing |
| before the 1979 season | Released | Steve Waterbury | Philadelphia Phillies | — | 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.