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The 1973 season’s official transaction log: 396 trades, signings and releases involving major-league clubs, listed newest first.
| Date | Type | Player | From | To | Details |
|---|---|---|---|---|---|
| Dec 30, 1973 | Signed | Rufino Linares | — | Atlanta Braves | Amateur free agent signing |
| Dec 27, 1973 | Released | Rick Austin | Milwaukee Brewers | — | Release |
| Dec 24, 1973 | Signed | Byron McLaughlin | — | Montreal Expos | Amateur free agent signing |
| Dec 20, 1973 | Trade | Pat Jarvis | Montreal Expos | Texas Rangers | Trade |
| Dec 20, 1973 | Trade | Larry Biittner | Texas Rangers | Montreal Expos | Trade |
| Dec 20, 1973 | Trade | Steve Simpson | San Diego Padres | New York Mets | Trade |
| Dec 20, 1973 | Trade | Jim McAndrew | New York Mets | San Diego Padres | Trade |
| Dec 19, 1973 | Signed as free agent | Tony Taylor | — | Philadelphia Phillies | Free agent signing |
| Dec 18, 1973 | Trade | Jim Kremmel | Chicago White Sox | Chicago Cubs | Trade |
| Dec 17, 1973 | Signed as free agent | Lew Krausse | — | Atlanta Braves | Free agent signing |
| Dec 15, 1973 | Trade | Ron Clark | San Diego Padres | Philadelphia Phillies | Trade |
| Dec 15, 1973 | Trade | Gene Martin | Philadelphia Phillies | San Diego Padres | Trade |
| Dec 14, 1973 | Released | Darrell Brandon | Philadelphia Phillies | — | Release |
| Dec 14, 1973 | Released | Wes Parker | Los Angeles Dodgers | — | Release |
| Dec 12, 1973 | Released | Rico Carty | Oakland Athletics | — | Release |
| Dec 12, 1973 | Trade | Steve Blateric | Cincinnati Reds | Cleveland Indians | Trade |
| Dec 12, 1973 | Trade | Roger Freed | Cleveland Indians | Cincinnati Reds | Trade |
| Dec 12, 1973 | Trade | Dwain Anderson | San Diego Padres | Cleveland Indians | Trade |
| Dec 12, 1973 | Trade | Lou Camilli | Cleveland Indians | San Diego Padres | Trade |
| Dec 11, 1973 | Released | Ron Swoboda | New York Yankees | — | Release |
| Dec 11, 1973 | Trade | Ron Santo | Chicago Cubs | Chicago White Sox | Trade |
| Dec 11, 1973 | Trade | Steve Stone | Chicago White Sox | Chicago Cubs | Trade |
| Dec 11, 1973 | Trade | Ken Frailing | Chicago White Sox | Chicago Cubs | Trade |
| Dec 11, 1973 | Trade | Steve Swisher | Chicago White Sox | Chicago Cubs | Trade |
| Dec 10, 1973 | Released | Hal Lanier | New York Yankees | — | Release |
| Dec 10, 1973 | Signed | Dennis Martinez | — | Baltimore Orioles | Amateur free agent signing |
| Dec 10, 1973 | Trade | Paul Jata | Detroit Tigers | Minnesota Twins | Trade |
| Dec 10, 1973 | Trade | Jim Nettles | Minnesota Twins | Detroit Tigers | Trade |
| Dec 9, 1973 | Trade | Mike Nagy | St. Louis Cardinals | Houston Astros | Trade |
| Dec 9, 1973 | Trade | Jay Schlueter | Houston Astros | St. Louis Cardinals | Trade |
| Dec 8, 1973 | Trade | Tom Murphy | St. Louis Cardinals | Milwaukee Brewers | Trade |
| Dec 8, 1973 | Trade | Bob Heise | Milwaukee Brewers | St. Louis Cardinals | Trade |
| Dec 7, 1973 | Trade | Lindy McDaniel | New York Yankees | Kansas City Royals | Trade |
| Dec 7, 1973 | Trade | Lou Piniella | Kansas City Royals | New York Yankees | Trade |
| Dec 7, 1973 | Trade | Ken Wright | Kansas City Royals | New York Yankees | Trade |
| Dec 7, 1973 | Trade | Bob Johnson | Pittsburgh Pirates | Cleveland Indians | Trade |
| Dec 7, 1973 | Trade | Bill Flowers | Cleveland Indians | Pittsburgh Pirates | Trade |
| Dec 7, 1973 | Trade | Reggie Cleveland | St. Louis Cardinals | Boston Red Sox | Trade |
| Dec 7, 1973 | Trade | Diego Segui | St. Louis Cardinals | Boston Red Sox | Trade |
| Dec 7, 1973 | Trade | Terry Hughes | St. Louis Cardinals | Boston Red Sox | Trade |
| Dec 7, 1973 | Trade | Lynn McGlothen | Boston Red Sox | St. Louis Cardinals | Trade |
| Dec 7, 1973 | Trade | John Curtis | Boston Red Sox | St. Louis Cardinals | Trade |
| Dec 7, 1973 | Trade | Mike Garman | Boston Red Sox | St. Louis Cardinals | Trade |
| Dec 6, 1973 | Trade | Denny Doyle | Philadelphia Phillies | California Angels | Trade |
| Dec 6, 1973 | Trade | Aurelio Monteagudo | California Angels | Philadelphia Phillies | Trade |
| Dec 6, 1973 | Trade | Chris Coletta | California Angels | Philadelphia Phillies | Trade |
| Dec 6, 1973 | Trade | Jim Wynn | Houston Astros | Los Angeles Dodgers | Trade |
| Dec 6, 1973 | Trade | Claude Osteen | Los Angeles Dodgers | Houston Astros | Trade |
| Dec 6, 1973 | Trade | David Culpepper | Los Angeles Dodgers | Houston Astros | Trade |
| Dec 6, 1973 | Trade | John Andrews | St. Louis Cardinals | California Angels | Trade |
| Dec 6, 1973 | Trade | Jeff Torborg | California Angels | St. Louis Cardinals | Trade |
| Dec 6, 1973 | Trade | Ray Newman | Milwaukee Brewers | Detroit Tigers | Trade |
| Dec 6, 1973 | Trade | Mike Strahler | Detroit Tigers | Milwaukee Brewers | Trade |
| Dec 6, 1973 | Trade | Randy Hundley | Chicago Cubs | Minnesota Twins | Trade |
| Dec 6, 1973 | Trade | George Mitterwald | Minnesota Twins | Chicago Cubs | Trade |
| Dec 5, 1973 | Trade | Steve Hargan | Cleveland Indians | Texas Rangers | Trade |
| Dec 5, 1973 | Trade | Mike Marshall | Montreal Expos | Los Angeles Dodgers | Trade |
| Dec 5, 1973 | Trade | Willie Davis | Los Angeles Dodgers | Montreal Expos | Trade |
| Dec 5, 1973 | Trade | Pete Richert | Los Angeles Dodgers | St. Louis Cardinals | Trade |
| Dec 5, 1973 | Trade | Tommie Agee | St. Louis Cardinals | Los Angeles Dodgers | Trade |
| Dec 5, 1973 | Trade | Chris Zachary | Pittsburgh Pirates | Philadelphia Phillies | Trade |
| Dec 5, 1973 | Trade | Pete Koegel | Philadelphia Phillies | Pittsburgh Pirates | Trade |
| Dec 4, 1973 | Trade | Dan Neumeier | Chicago White Sox | Houston Astros | Trade |
| Dec 4, 1973 | Trade | Gil Garrido | Atlanta Braves | Philadelphia Phillies | Trade |
| Dec 4, 1973 | Trade | Bob Beall | Philadelphia Phillies | Atlanta Braves | Trade |
| Dec 4, 1973 | Trade | Ross Grimsley | Cincinnati Reds | Baltimore Orioles | Trade |
| Dec 4, 1973 | Trade | Wallace Williams | Cincinnati Reds | Baltimore Orioles | Trade |
| Dec 4, 1973 | Trade | Merv Rettenmund | Baltimore Orioles | Cincinnati Reds | Trade |
| Dec 4, 1973 | Trade | Junior Kennedy | Baltimore Orioles | Cincinnati Reds | Trade |
| Dec 4, 1973 | Trade | William Wood | Baltimore Orioles | Cincinnati Reds | Trade |
| Dec 4, 1973 | Trade | Nelson Briles | Pittsburgh Pirates | Kansas City Royals | Trade |
| Dec 4, 1973 | Trade | Fernando Gonzalez | Pittsburgh Pirates | Kansas City Royals | Trade |
| Dec 4, 1973 | Trade | Ed Kirkpatrick | Kansas City Royals | Pittsburgh Pirates | Trade |
| Dec 4, 1973 | Trade | Kurt Bevacqua | Kansas City Royals | Pittsburgh Pirates | Trade |
| Dec 4, 1973 | Trade | Winston Cole | Kansas City Royals | Pittsburgh Pirates | Trade |
| Dec 4, 1973 | Trade | Francisco Barrios | Jalisco | Chicago White Sox | Trade |
| Dec 4, 1973 | Trade | Manuel Lugo | Jalisco | Chicago White Sox | Trade |
| Dec 4, 1973 | Trade | Rudy Hernandez | Chicago White Sox | Jalisco | Trade |
| Dec 3, 1973 | Signed | Mario Soto | — | Cincinnati Reds | Amateur free agent signing |
| Dec 3, 1973 | Released | Tony Taylor | Detroit Tigers | — | Release |
| Dec 3, 1973 | Trade | Unnamed | Detroit Tigers | Houston Astros | $ |
| Dec 3, 1973 | Trade | Jim Ray | Houston Astros | Detroit Tigers | Trade |
| Dec 3, 1973 | Trade | Gary Sutherland | Houston Astros | Detroit Tigers | Trade |
| Dec 3, 1973 | Trade | Fred Scherman | Detroit Tigers | Houston Astros | Trade |
| Dec 3, 1973 | Trade | Ron Schueler | Atlanta Braves | Philadelphia Phillies | Trade |
| Dec 3, 1973 | Trade | Barry Lersch | Philadelphia Phillies | Atlanta Braves | Trade |
| Dec 3, 1973 | Trade | Craig Robinson | Philadelphia Phillies | Atlanta Braves | Trade |
| Dec 3, 1973 | Trade | John Wockenfuss | St. Louis Cardinals | Detroit Tigers | Trade |
| Dec 3, 1973 | Trade | Lawrence Elliott | Detroit Tigers | St. Louis Cardinals | Trade |
| Dec 3, 1973 | Trade | Denny O'Toole | St. Louis Cardinals | Cleveland Indians | Trade |
| Dec 3, 1973 | Trade | Jim Rittwage | Cleveland Indians | St. Louis Cardinals | Trade |
| Nov 29, 1973 | Signed | Luis Salazar | — | Kansas City Royals | Amateur free agent signing |
| Nov 14, 1973 | Trade | Larry Gura | Chicago Cubs | Texas Rangers | Trade |
| Nov 13, 1973 | Signed | Tony Bernazard | — | Montreal Expos | Amateur free agent signing |
| Nov 9, 1973 | Trade | Clay Kirby | San Diego Padres | Cincinnati Reds | Trade |
| Nov 9, 1973 | Trade | Bobby Tolan | Cincinnati Reds | San Diego Padres | Trade |
| Nov 9, 1973 | Trade | Dave Tomlin | Cincinnati Reds | San Diego Padres | Trade |
| Nov 7, 1973 | Trade | Bill Wilson | Philadelphia Phillies | Milwaukee Brewers | Trade |
| Nov 7, 1973 | Trade | Frank Linzy | Milwaukee Brewers | Philadelphia Phillies | Trade |
| Nov 7, 1973 | Trade | Jerry Morales | San Diego Padres | Chicago Cubs | Trade |
| Nov 7, 1973 | Trade | Glenn Beckert | Chicago Cubs | San Diego Padres | Trade |
| Nov 7, 1973 | Trade | Bobby Fenwick | Chicago Cubs | San Diego Padres | Trade |
| Nov 3, 1973 | Trade | Cecil Upshaw | Houston Astros | Cleveland Indians | Trade |
| Nov 3, 1973 | Trade | Jerry Johnson | Cleveland Indians | Houston Astros | Trade |
| Nov 3, 1973 | Trade | Bob Locker | Chicago Cubs | Oakland Athletics | Trade |
| Nov 3, 1973 | Trade | Horacio Pina | Oakland Athletics | Chicago Cubs | Trade |
| Nov 1, 1973 | Released | Mike Andrews | Oakland Athletics | — | Release |
| Oct 31, 1973 | Trade | Jerry Reuss | Houston Astros | Pittsburgh Pirates | Trade |
| Oct 31, 1973 | Trade | Milt May | Pittsburgh Pirates | Houston Astros | Trade |
| Oct 29, 1973 | Signed | Charlie Beamon | — | Kansas City Royals | Amateur free agent signing |
| Oct 26, 1973 | Released | Bernie Allen | Montreal Expos | — | Release |
| Oct 26, 1973 | Released | Eddie Fisher | St. Louis Cardinals | — | Release |
| Oct 26, 1973 | Released | Lew Krausse | St. Louis Cardinals | — | Release |
| Oct 26, 1973 | Trade | Unnamed | St. Louis Cardinals | Texas Rangers | $ |
| Oct 26, 1973 | Trade | Tommy Cruz | St. Louis Cardinals | Texas Rangers | Trade |
| Oct 26, 1973 | Trade | Sonny Siebert | Texas Rangers | St. Louis Cardinals | Trade |
| Oct 26, 1973 | Trade | Jim Fairey | Los Angeles Dodgers | Minnesota Twins | Trade |
| Oct 26, 1973 | Trade | Mike Floyd | Los Angeles Dodgers | Minnesota Twins | Trade |
| Oct 26, 1973 | Trade | Charlie Manuel | Minnesota Twins | Los Angeles Dodgers | Trade |
| Oct 26, 1973 | Trade | Glenn Ezell | Minnesota Twins | Los Angeles Dodgers | Trade |
| Oct 26, 1973 | Trade | Jim Kremmel | St. Louis Cardinals | Chicago White Sox | Trade |
| Oct 26, 1973 | Trade | Denny O'Toole | Chicago White Sox | St. Louis Cardinals | Trade |
| Oct 26, 1973 | Trade | Rick Wise | St. Louis Cardinals | Boston Red Sox | Trade |
| Oct 26, 1973 | Trade | Bernie Carbo | St. Louis Cardinals | Boston Red Sox | Trade |
| Oct 26, 1973 | Trade | Reggie Smith | Boston Red Sox | St. Louis Cardinals | Trade |
| Oct 26, 1973 | Trade | Ken Tatum | Boston Red Sox | St. Louis Cardinals | Trade |
| Oct 25, 1973 | Released | Ray Culp | Boston Red Sox | — | Release |
| Oct 25, 1973 | Released | Frank Howard | Detroit Tigers | — | Release |
| Oct 25, 1973 | Released | Bob Veale | Boston Red Sox | — | Release |
| Oct 25, 1973 | Trade | Mike Caldwell | San Diego Padres | San Francisco Giants | Trade |
| Oct 25, 1973 | Trade | Willie McCovey | San Francisco Giants | San Diego Padres | Trade |
| Oct 25, 1973 | Trade | Bernie Williams | San Francisco Giants | San Diego Padres | Trade |
| Oct 25, 1973 | Trade | Fergie Jenkins | Chicago Cubs | Texas Rangers | Trade |
| Oct 25, 1973 | Trade | Bill Madlock | Texas Rangers | Chicago Cubs | Trade |
| Oct 25, 1973 | Trade | Vic Harris | Texas Rangers | Chicago Cubs | Trade |
| Oct 24, 1973 | Trade | Ken Gill | Minnesota Twins | Kansas City Royals | Trade |
| Oct 24, 1973 | Trade | Tom Burgmeier | Kansas City Royals | Minnesota Twins | Trade |
| Oct 24, 1973 | Trade | Dick Drago | Kansas City Royals | Boston Red Sox | Trade |
| Oct 24, 1973 | Trade | Marty Pattin | Boston Red Sox | Kansas City Royals | Trade |
| Oct 23, 1973 | Released | Chris Cannizzaro | Los Angeles Dodgers | — | Release |
| Oct 23, 1973 | Released | John Felske | Milwaukee Brewers | — | Release |
| Oct 23, 1973 | Released | Jimmy Stewart | Houston Astros | — | Release |
| Oct 23, 1973 | Trade | Dick McAuliffe | Detroit Tigers | Boston Red Sox | Trade |
| Oct 23, 1973 | Trade | Ben Oglivie | Boston Red Sox | Detroit Tigers | Trade |
| Oct 23, 1973 | Trade | Hector Torres | Houston Astros | Chicago White Sox | Trade |
| Oct 22, 1973 | Trade | Unnamed | California Angels | Milwaukee Brewers | $ |
| Oct 22, 1973 | Trade | Ellie Rodriguez | Milwaukee Brewers | California Angels | Trade |
| Oct 22, 1973 | Trade | Skip Lockwood | Milwaukee Brewers | California Angels | Trade |
| Oct 22, 1973 | Trade | Gary Ryerson | Milwaukee Brewers | California Angels | Trade |
| Oct 22, 1973 | Trade | Ollie Brown | Milwaukee Brewers | California Angels | Trade |
| Oct 22, 1973 | Trade | Joe Lahoud | Milwaukee Brewers | California Angels | Trade |
| Oct 22, 1973 | Trade | Clyde Wright | California Angels | Milwaukee Brewers | Trade |
| Oct 22, 1973 | Trade | Steve Barber | California Angels | Milwaukee Brewers | Trade |
| Oct 22, 1973 | Trade | Ken Berry | California Angels | Milwaukee Brewers | Trade |
| Oct 22, 1973 | Trade | Art Kusnyer | California Angels | Milwaukee Brewers | Trade |
| Oct 18, 1973 | Trade | Dave Cash | Pittsburgh Pirates | Philadelphia Phillies | Trade |
| Oct 18, 1973 | Trade | Ken Brett | Philadelphia Phillies | Pittsburgh Pirates | Trade |
| Oct 11, 1973 | Trade | Bill Butler | Cleveland Indians | Minnesota Twins | Trade |
| Oct 11, 1973 | Trade | Dick Colpaert | Cleveland Indians | Minnesota Twins | Trade |
| Oct 11, 1973 | Trade | Jim Strickland | Minnesota Twins | Cleveland Indians | Trade |
| Oct 11, 1973 | Trade | Mike Brooks | Minnesota Twins | Cleveland Indians | Trade |
| Oct 9, 1973 | Released | Fred Gladding | Houston Astros | — | Release |
| Oct 9, 1973 | Released | Don McMahon | San Francisco Giants | — | Release |
| Oct 4, 1973 | Released | Ron Perranoski | California Angels | — | Release |
| Oct 2, 1973 | Trade | Steve Kealey | Chicago White Sox | Cincinnati Reds | Trade |
| Sep 30, 1973 | Trade | Roe Skidmore | Cincinnati Reds | St. Louis Cardinals | Trade |
| Sep 25, 1973 | Trade | Bill Stein | St. Louis Cardinals | California Angels | Trade |
| Sep 25, 1973 | Trade | Jerry DaVanon | California Angels | St. Louis Cardinals | Trade |
| Sep 19, 1973 | Signed | Terry Puhl | — | Houston Astros | Amateur free agent signing |
| Sep 18, 1973 | Signed as free agent | Greg Thayer | — | Minnesota Twins | Free agent signing |
| Sep 12, 1973 | Trade | Ken Crosby | New York Yankees | St. Louis Cardinals | Trade |
| Sep 11, 1973 | Signed | Willie Hernandez | — | Philadelphia Phillies | Amateur free agent signing |
| Sep 11, 1973 | Released | Luis Quintana | San Francisco Giants | — | Release |
| Sep 11, 1973 | Trade | Lafayette Currence | Pittsburgh Pirates | Milwaukee Brewers | Trade |
| Sep 11, 1973 | Trade | Greg Erardi | Milwaukee Brewers | Pittsburgh Pirates | Trade |
| Sep 6, 1973 | Released | Francisco Barrios | San Francisco Giants | — | Release |
| Sep 5, 1973 | Released | Coco Laboy | Montreal Expos | — | Release |
| Sep 5, 1973 | Trade | Al Closter | New York Yankees | Atlanta Braves | Trade |
| Aug 31, 1973 | Trade | Mike Paul | Texas Rangers | Chicago Cubs | Trade |
| Aug 29, 1973 | Trade | Jim McGlothlin | Cincinnati Reds | Chicago White Sox | Trade |
| Aug 29, 1973 | Trade | Pat Bourque | Chicago Cubs | Oakland Athletics | Trade |
| Aug 29, 1973 | Trade | Gonzalo Marquez | Oakland Athletics | Chicago Cubs | Trade |
| Aug 23, 1973 | Signed | Jeff Cox | — | Kansas City Royals | Amateur free agent signing |
| Aug 22, 1973 | Signed | Alfredo Griffin | — | Cleveland Indians | Amateur free agent signing |
| Aug 18, 1973 | Released | Johnny Callison | New York Yankees | — | Release |
| Aug 18, 1973 | Trade | Unnamed | St. Louis Cardinals | Houston Astros | $ |
| Aug 18, 1973 | Trade | Tommie Agee | Houston Astros | St. Louis Cardinals | Trade |
| Aug 18, 1973 | Trade | Dave Campbell | St. Louis Cardinals | Houston Astros | Trade |
| Aug 17, 1973 | Released | Rich Reese | Detroit Tigers | — | Release |
| Aug 17, 1973 | Signed as free agent | Rich Reese | — | Minnesota Twins | Free agent signing |
| Aug 16, 1973 | Released | Jose Pagan | Philadelphia Phillies | — | Release |
| Aug 15, 1973 | Trade | Dave Cheadle | New York Yankees | Atlanta Braves | Trade |
| Aug 14, 1973 | Trade | Billy Grabarkewitz | California Angels | Philadelphia Phillies | Trade |
| Aug 9, 1973 | Signed as free agent | Francisco Barrios | — | San Francisco Giants | Free agent signing with first major-league team |
| Aug 7, 1973 | Trade | Unnamed | New York Yankees | St. Louis Cardinals | $ |
| Aug 7, 1973 | Trade | Wayne Granger | St. Louis Cardinals | New York Yankees | Trade |
| Jul 31, 1973 | Signed as free agent | Mike Andrews | — | Oakland Athletics | Free agent signing |
| Jul 30, 1973 | Signed as free agent | Jerry Kenney | — | New York Yankees | Free agent signing |
| Jul 30, 1973 | Signed as free agent | Jerry May | — | Pittsburgh Pirates | Free agent signing |
| Jul 27, 1973 | Trade | Ed Crosby | St. Louis Cardinals | Cincinnati Reds | Trade |
| Jul 27, 1973 | Trade | Gene Dusan | St. Louis Cardinals | Cincinnati Reds | Trade |
| Jul 27, 1973 | Trade | Ed Sprague | Cincinnati Reds | St. Louis Cardinals | Trade |
| Jul 25, 1973 | Signed | Joe Gates | — | Kansas City Royals | Amateur free agent signing |
| Jul 23, 1973 | Signed | Mike Bacsik | — | Texas Rangers | Amateur free agent signing |
| Jul 18, 1973 | Signed as free agent | Curt Motton | — | Baltimore Orioles | Free agent signing |
| Jul 16, 1973 | Released | Mike Andrews | Chicago White Sox | — | Release |
| Jul 16, 1973 | Released | Curt Motton | California Angels | — | Release |
| Jul 16, 1973 | Trade | Don Durham | St. Louis Cardinals | Texas Rangers | Trade |
| Jul 16, 1973 | Trade | Jim Kremmel | Texas Rangers | St. Louis Cardinals | Trade |
| Jul 11, 1973 | Signed | Mark Lemongello | — | Detroit Tigers | Amateur free agent signing |
| Jul 10, 1973 | Released | Jerry May | New York Mets | — | Release |
| Jul 10, 1973 | Signed as free agent | Rick Reichardt | — | Kansas City Royals | Free agent signing |
| Jul 8, 1973 | Released | Bobby Fenwick | Houston Astros | — | Release |
| Jul 8, 1973 | Signed as free agent | Bobby Fenwick | — | Chicago Cubs | Free agent signing |
| Jul 6, 1973 | Trade | Ed Figueroa | San Francisco Giants | California Angels | Trade |
| Jul 6, 1973 | Trade | Don Rose | California Angels | San Francisco Giants | Trade |
| Jul 6, 1973 | Trade | Bruce Christensen | California Angels | San Francisco Giants | Trade |
| Jul 5, 1973 | Released | Jerry McNertney | Pittsburgh Pirates | — | Release |
| Jul 2, 1973 | Signed | Ron LeFlore | — | Detroit Tigers | Amateur free agent signing |
| Jul 1, 1973 | Signed as free agent | John Cumberland | — | California Angels | Free agent signing |
| Jun 30, 1973 | Released | John Cumberland | San Francisco Giants | — | Release |
| Jun 30, 1973 | Signed | Gordie Pladson | — | Houston Astros | Amateur free agent signing |
| Jun 28, 1973 | Released | Rick Reichardt | Chicago White Sox | — | Release |
| Jun 25, 1973 | Signed as free agent | Don McMahon | — | San Francisco Giants | Free agent signing |
| Jun 24, 1973 | Signed | Steve McCatty | — | Oakland Athletics | Amateur free agent signing |
| Jun 23, 1973 | Signed as free agent | Terry Enyart | — | Montreal Expos | Free agent signing |
| Jun 22, 1973 | Signed | Greg Mahlberg | — | Texas Rangers | Amateur free agent signing |
| Jun 22, 1973 | Released | Gary Neibauer | Philadelphia Phillies | — | Release |
| Jun 22, 1973 | Signed as free agent | Gary Neibauer | — | Atlanta Braves | Free agent signing |
| Jun 19, 1973 | Released | Joe Pepitone | Atlanta Braves | — | Release |
| Jun 19, 1973 | Trade | Terry Wilshusen | California Angels | Cincinnati Reds | Trade |
| Jun 19, 1973 | Trade | Thor Skogan | California Angels | Cincinnati Reds | Trade |
| Jun 18, 1973 | Released | Bob Barton | Cincinnati Reds | — | Release |
| Jun 17, 1973 | Signed | Rick Langford | — | Pittsburgh Pirates | Amateur free agent signing |
| Jun 15, 1973 | Signed | Bob Reece | — | Montreal Expos | Amateur free agent signing |
| Jun 15, 1973 | Trade | Richie Scheinblum | Cincinnati Reds | California Angels | Trade |
| Jun 15, 1973 | Trade | Tom Timmermann | Detroit Tigers | Cleveland Indians | Trade |
| Jun 15, 1973 | Trade | Kevin Collins | Detroit Tigers | Cleveland Indians | Trade |
| Jun 15, 1973 | Trade | Ed Farmer | Cleveland Indians | Detroit Tigers | Trade |
| Jun 13, 1973 | Signed | Ray Cosey | — | Oakland Athletics | Amateur free agent signing |
| Jun 12, 1973 | Released | Bobby Fenwick | St. Louis Cardinals | — | Release |
| Jun 12, 1973 | Signed as free agent | Bobby Fenwick | — | Houston Astros | Free agent signing |
| Jun 12, 1973 | Trade | Mike Kekich | New York Yankees | Cleveland Indians | Trade |
| Jun 12, 1973 | Trade | Lowell Palmer | Cleveland Indians | New York Yankees | Trade |
| Jun 12, 1973 | Trade | Unnamed | Cincinnati Reds | San Diego Padres | $ |
| Jun 12, 1973 | Trade | Fred Norman | San Diego Padres | Cincinnati Reds | Trade |
| Jun 12, 1973 | Trade | Gene Locklear | Cincinnati Reds | San Diego Padres | Trade |
| Jun 12, 1973 | Trade | Mike Johnson | Cincinnati Reds | San Diego Padres | Trade |
| Jun 10, 1973 | Trade | Aurelio Monteagudo | San Diego Padres | California Angels | Trade |
| Jun 10, 1973 | Trade | Ron Clark | California Angels | San Diego Padres | Trade |
| Jun 8, 1973 | Trade | Stan Papi | Houston Astros | St. Louis Cardinals | Trade |
| Jun 8, 1973 | Trade | Ray Busse | St. Louis Cardinals | Houston Astros | Trade |
| Jun 8, 1973 | Trade | Mike Jackson | Kansas City Royals | Cleveland Indians | Trade |
| Jun 8, 1973 | Trade | Steve Mingori | Cleveland Indians | Kansas City Royals | Trade |
| Jun 7, 1973 | Signed as free agent | Dick Baney | — | Cincinnati Reds | Free agent signing |
| Jun 7, 1973 | Signed | Jeffrey Leonard | — | Los Angeles Dodgers | Amateur free agent signing |
| Jun 7, 1973 | Trade | Pat Dobson | Atlanta Braves | New York Yankees | Trade |
| Jun 7, 1973 | Trade | Frank Tepedino | New York Yankees | Atlanta Braves | Trade |
| Jun 7, 1973 | Trade | Wayne Nordhagen | New York Yankees | Atlanta Braves | Trade |
| Jun 7, 1973 | Trade | Dave Campbell | San Diego Padres | St. Louis Cardinals | Trade |
| Jun 7, 1973 | Trade | Dwain Anderson | St. Louis Cardinals | San Diego Padres | Trade |
| Jun 6, 1973 | Trade | Jim Bibby | St. Louis Cardinals | Texas Rangers | Trade |
| Jun 6, 1973 | Trade | Mike Nagy | Texas Rangers | St. Louis Cardinals | Trade |
| Jun 6, 1973 | Trade | John Wockenfuss | Texas Rangers | St. Louis Cardinals | Trade |
| Jun 2, 1973 | Signed as free agent | Rick Austin | — | Milwaukee Brewers | Free agent signing |
| Jun 1973 | Trade | Jim Hutto | California Angels | Baltimore Orioles | Trade |
| Jun 1973 | Trade | Dave Leonhard | Baltimore Orioles | California Angels | Trade |
| May 25, 1973 | Released | Rick Austin | Cleveland Indians | — | Release |
| May 22, 1973 | Trade | Tom Heierle | Atlanta Braves | Houston Astros | Trade |
| May 22, 1973 | Trade | Larry Howard | Houston Astros | Atlanta Braves | Trade |
| May 21, 1973 | Signed as free agent | Dick Selma | — | St. Louis Cardinals | Free agent signing |
| May 20, 1973 | Trade | Mike Epstein | Texas Rangers | California Angels | Trade |
| May 20, 1973 | Trade | Rich Hand | Texas Rangers | California Angels | Trade |
| May 20, 1973 | Trade | Rick Stelmaszek | Texas Rangers | California Angels | Trade |
| May 20, 1973 | Trade | Jim Spencer | California Angels | Texas Rangers | Trade |
| May 20, 1973 | Trade | Lloyd Allen | California Angels | Texas Rangers | Trade |
| May 19, 1973 | Trade | Andre Thornton | Atlanta Braves | Chicago Cubs | Trade |
| May 19, 1973 | Trade | Joe Pepitone | Chicago Cubs | Atlanta Braves | Trade |
| May 14, 1973 | Trade | Bob Didier | Atlanta Braves | Detroit Tigers | Trade |
| May 14, 1973 | Trade | Gene Lamont | Detroit Tigers | Atlanta Braves | Trade |
| May 12, 1973 | Signed | Gary Woods | — | Oakland Athletics | Amateur free agent signing |
| May 11, 1973 | Signed | Mark Budaska | — | Oakland Athletics | Amateur free agent signing |
| May 10, 1973 | Released | Dick Baney | Oakland Athletics | — | Release |
| May 10, 1973 | Trade | Dick Bosman | Texas Rangers | Cleveland Indians | Trade |
| May 10, 1973 | Trade | Ted Ford | Texas Rangers | Cleveland Indians | Trade |
| May 10, 1973 | Trade | Steve Dunning | Cleveland Indians | Texas Rangers | Trade |
| May 8, 1973 | Released | Dick Selma | Philadelphia Phillies | — | Release |
| May 8, 1973 | Trade | Tom Murphy | Kansas City Royals | St. Louis Cardinals | Trade |
| May 8, 1973 | Trade | Al Santorini | St. Louis Cardinals | Kansas City Royals | Trade |
| May 7, 1973 | Signed as free agent | Mike Ferraro | — | New York Yankees | Free agent signing |
| May 6, 1973 | Signed | Joe Keener | — | Montreal Expos | Amateur free agent signing |
| May 4, 1973 | Released | Jerry Kenney | Cleveland Indians | — | Release |
| May 2, 1973 | Signed as free agent | Dick Baney | — | Oakland Athletics | Free agent signing |
| May 2, 1973 | Released | Mike Ferraro | Minnesota Twins | — | Release |
| May 2, 1973 | Trade | Deron Johnson | Philadelphia Phillies | Oakland Athletics | Trade |
| May 2, 1973 | Trade | Jack Bastable | Oakland Athletics | Philadelphia Phillies | Trade |
| Apr 24, 1973 | Trade | Rick Auerbach | Milwaukee Brewers | Los Angeles Dodgers | Trade |
| Apr 24, 1973 | Trade | Tim Johnson | Los Angeles Dodgers | Milwaukee Brewers | Trade |
| Apr 22, 1973 | Trade | Cecil Upshaw | Atlanta Braves | Houston Astros | Trade |
| Apr 22, 1973 | Trade | Norm Miller | Houston Astros | Atlanta Braves | Trade |
| Apr 21, 1973 | Signed as free agent | John Cumberland | — | San Francisco Giants | Free agent signing |
| Apr 19, 1973 | Trade | Charlie Sands | Detroit Tigers | California Angels | Trade |
| Apr 19, 1973 | Trade | Mike Strahler | California Angels | Detroit Tigers | Trade |
| Apr 17, 1973 | Released | Casey Cox | New York Yankees | — | Release |
| Apr 14, 1973 | Signed as free agent | Jim Fairey | — | Los Angeles Dodgers | Free agent signing |
| Apr 14, 1973 | Trade | Al Gallagher | San Francisco Giants | California Angels | Trade |
| Apr 14, 1973 | Trade | Bruce Miller | California Angels | San Francisco Giants | Trade |
| Apr 13, 1973 | Trade | John Montague | Baltimore Orioles | Montreal Expos | Trade |
| Apr 11, 1973 | Signed as free agent | Chuck Taylor | — | Montreal Expos | Free agent signing |
| Apr 10, 1973 | Released | John Cumberland | Minnesota Twins | — | Release |
| Apr 8, 1973 | Signed | Doug Ault | — | Texas Rangers | Amateur free agent signing |
| Apr 6, 1973 | Signed as free agent | Ron Perranoski | — | California Angels | Free agent signing |
| Apr 6, 1973 | Released | Greg Thayer | San Francisco Giants | — | Release |
| Apr 5, 1973 | Released | Dick Baney | Chicago White Sox | — | Release |
| Apr 5, 1973 | Trade | Tommy Matchick | Baltimore Orioles | New York Yankees | Trade |
| Apr 5, 1973 | Trade | Frank Baker | New York Yankees | Baltimore Orioles | Trade |
| Apr 3, 1973 | Trade | Tim Hosley | Detroit Tigers | Oakland Athletics | Trade |
| Apr 3, 1973 | Trade | Don Shaw | Oakland Athletics | Detroit Tigers | Trade |
| Apr 2, 1973 | Signed as free agent | Bob Miller | — | San Diego Padres | Free agent signing |
| Apr 2, 1973 | Trade | Charlie Sands | Pittsburgh Pirates | Detroit Tigers | Trade |
| Apr 2, 1973 | Trade | Chris Zachary | Detroit Tigers | Pittsburgh Pirates | Trade |
| Apr 2, 1973 | Trade | Greg Minton | Kansas City Royals | San Francisco Giants | Trade |
| Apr 2, 1973 | Trade | Fran Healy | San Francisco Giants | Kansas City Royals | Trade |
| Apr 2, 1973 | Trade | Tommy McCraw | Cleveland Indians | California Angels | Trade |
| Apr 2, 1973 | Trade | Robert Marcano | Cleveland Indians | California Angels | Trade |
| Apr 2, 1973 | Trade | Leo Cardenas | California Angels | Cleveland Indians | Trade |
| Mar 31, 1973 | Signed as free agent | Larry Brown | — | Baltimore Orioles | Free agent signing |
| Mar 31, 1973 | Signed as free agent | Jay Johnstone | — | Oakland Athletics | Free agent signing |
| Mar 31, 1973 | Signed as free agent | Lew Krausse | — | Oakland Athletics | Free agent signing |
| Mar 31, 1973 | Trade | Mike Nagy | St. Louis Cardinals | Texas Rangers | Trade |
| Mar 31, 1973 | Trade | Mike Thompson | Texas Rangers | St. Louis Cardinals | Trade |
| Mar 29, 1973 | Released | Chuck Taylor | Milwaukee Brewers | — | Release |
| Mar 29, 1973 | Trade | Lance Clemons | St. Louis Cardinals | Boston Red Sox | Trade |
| Mar 28, 1973 | Signed | Larry Landreth | — | Montreal Expos | Amateur free agent signing |
| Mar 28, 1973 | Trade | Bill McNulty | Texas Rangers | New York Mets | Trade |
| Mar 28, 1973 | Trade | Bill Sudakis | New York Mets | Texas Rangers | Trade |
| Mar 27, 1973 | Released | Jim Fairey | Montreal Expos | — | Release |
| Mar 27, 1973 | Released | Jack Hiatt | California Angels | — | Release |
| Mar 27, 1973 | Released | Lew Krausse | Boston Red Sox | — | Release |
| Mar 27, 1973 | Released | Bob Miller | Pittsburgh Pirates | — | Release |
| Mar 27, 1973 | Trade | Mike Ferraro | Milwaukee Brewers | Minnesota Twins | Trade |
| Mar 27, 1973 | Trade | Ken Reynolds | Minnesota Twins | Milwaukee Brewers | Trade |
| Mar 27, 1973 | Trade | Mel Behney | Cincinnati Reds | Boston Red Sox | Trade |
| Mar 27, 1973 | Trade | Phil Gagliano | Boston Red Sox | Cincinnati Reds | Trade |
| Mar 27, 1973 | Trade | Andy Kosco | Boston Red Sox | Cincinnati Reds | Trade |
| Mar 27, 1973 | Trade | Unnamed | Detroit Tigers | Minnesota Twins | $ |
| Mar 27, 1973 | Trade | Danny Fife | Detroit Tigers | Minnesota Twins | Trade |
| Mar 27, 1973 | Trade | Jim Perry | Minnesota Twins | Detroit Tigers | Trade |
| Mar 26, 1973 | Released | J. C. Martin | Chicago Cubs | — | Release |
| Mar 26, 1973 | Released | Denny McLain | Atlanta Braves | — | Release |
| Mar 25, 1973 | Trade | Bobby Brooks | Detroit Tigers | California Angels | Trade |
| Mar 25, 1973 | Trade | Bruce Kimm | California Angels | Detroit Tigers | Trade |
| Mar 24, 1973 | Trade | Dave Duncan | Oakland Athletics | Cleveland Indians | Trade |
| Mar 24, 1973 | Trade | George Hendrick | Oakland Athletics | Cleveland Indians | Trade |
| Mar 24, 1973 | Trade | Ray Fosse | Cleveland Indians | Oakland Athletics | Trade |
| Mar 24, 1973 | Trade | Jack Heidemann | Cleveland Indians | Oakland Athletics | Trade |
| Mar 22, 1973 | Released | Jim Nash | Philadelphia Phillies | — | Release |
| Mar 8, 1973 | Trade | Rich Hinton | Texas Rangers | Cleveland Indians | Trade |
| Mar 8, 1973 | Trade | Vince Colbert | Texas Rangers | Cleveland Indians | Trade |
| Mar 8, 1973 | Trade | Alex Johnson | Cleveland Indians | Texas Rangers | Trade |
| Mar 7, 1973 | Released | Jay Johnstone | Chicago White Sox | — | Release |
| Mar 7, 1973 | Released | Ed Spiezio | Chicago White Sox | — | Release |
| Mar 3, 1973 | Signed | Manny Castillo | — | New York Mets | Amateur free agent signing |
| Feb 28, 1973 | Signed as free agent | Andres Mora | — | Montreal Expos | Free agent signing with first major-league team |
| Feb 28, 1973 | Trade | Carl Morton | Montreal Expos | Atlanta Braves | Trade |
| Feb 28, 1973 | Trade | Pat Jarvis | Atlanta Braves | Montreal Expos | Trade |
| Feb 28, 1973 | Trade | Tony Solaita | New York Yankees | Pittsburgh Pirates | Trade |
| Feb 28, 1973 | Trade | George Kopacz | Pittsburgh Pirates | New York Yankees | Trade |
| Feb 11, 1973 | Signed as free agent | Marcel Lachemann | — | Montreal Expos | Free agent signing |
| Feb 7, 1973 | Trade | Chuck Hartenstein | Chicago White Sox | San Francisco Giants | Trade |
| Feb 7, 1973 | Trade | Glenn Redmon | Chicago White Sox | San Francisco Giants | Trade |
| Feb 7, 1973 | Trade | Skip Pitlock | San Francisco Giants | Chicago White Sox | Trade |
| Feb 2, 1973 | Released | Ted Abernathy | Kansas City Royals | — | Release |
| Feb 2, 1973 | Released | Don Buford | Baltimore Orioles | — | Release |
| Feb 1, 1973 | Trade | Charlie Hudson | St. Louis Cardinals | Texas Rangers | Trade |
| Feb 1, 1973 | Trade | Jim Lyttle | Chicago White Sox | Kansas City Royals | Trade |
| Feb 1, 1973 | Trade | Joe Keough | Kansas City Royals | Chicago White Sox | Trade |
| Feb 1, 1973 | Trade | Barry Raziano | New York Mets | Kansas City Royals | Trade |
| Feb 1, 1973 | Trade | Jerry Cram | Kansas City Royals | New York Mets | Trade |
| Jan 25, 1973 | Released | Dalton Jones | Texas Rangers | — | Release |
| Jan 24, 1973 | Trade | Mike Nagy | Boston Red Sox | St. Louis Cardinals | Trade |
| Jan 23, 1973 | Signed as free agent | Jerry McNertney | — | Oakland Athletics | Free agent signing |
| Jan 22, 1973 | Released | Marcel Lachemann | Oakland Athletics | — | Release |
| Jan 22, 1973 | Trade | Jack Whillock | Detroit Tigers | Montreal Expos | Trade |
| Jan 22, 1973 | Trade | Don Koonce | Montreal Expos | Detroit Tigers | Trade |
| Jan 21, 1973 | Signed as free agent | Curt Blefary | — | Atlanta Braves | Free agent signing |
| Jan 18, 1973 | Signed as free agent | Orlando Cepeda | — | Boston Red Sox | Free agent signing |
| Jan 15, 1973 | Released | John Bateman | Philadelphia Phillies | — | Release |
| Jan 15, 1973 | Signed | Pedro Guerrero | — | Cleveland Indians | Amateur free agent signing |
| Jan 12, 1973 | Signed | Luis Aponte | — | Boston Red Sox | Amateur free agent signing |
| Jan 11, 1973 | Signed as free agent | Don DeMola | — | Montreal Expos | Free agent signing |
| Jan 9, 1973 | Signed | Luis Pujols | — | Houston Astros | Amateur free agent signing |
| before the 1973 season | Signed | Cardell Camper | — | St. Louis Cardinals | Amateur free agent signing |
| before the 1973 season | Signed as free agent | Ray Culp | — | Boston Red Sox | Free agent signing |
| before the 1973 season | Signed | Luis Delgado | — | Boston Red Sox | Amateur free agent signing |
| before the 1973 season | Released | Terry Enyart | Minnesota Twins | — | 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.