| Transactions |
| Date | Team | Player | Type | OthTm | EffDate | When |
| 4/10/1970 | CLE | Capra | Demoted to reserve roster | | | Before |
| 4/10/1970 | PHI | Gardner,R | Demoted to reserve roster | | | Before |
| 4/20/1970 | CIN | Spinks | Demoted to reserve roster | | | Before |
| 4/29/1970 | HOU | Sprague | Demoted to reserve roster | | | Before |
| 5/4/1970 | BOS | McCarver | Demoted to reserve roster | | | Before |
| 5/4/1970 | MIL | Pena,R | Demoted to reserve roster | | | Before |
| 5/8/1970 | KCR | Edwards,D | Signed | | | Before |
| 5/8/1970 | KCR | Mitchell | Demoted to reserve roster | | | Before |
| 5/8/1970 | KCR | Porter | Demoted to reserve roster | | | Before |
| 5/8/1970 | SDP | Ivie | Demoted to reserve roster | | | Before |
| 5/11/1970 | KCR | Goodson | Demoted to reserve roster | | | Before |
| 5/18/1970 | CHW | Hrabosky | Demoted to reserve roster | | | Before |
| 5/18/1970 | CHW | Torrez | Demoted to reserve roster | | | Before |
| 5/18/1970 | CIN | Nelson,R | Promoted to active roster | | | Before |
| 5/18/1970 | HOU | Sprague | Promoted to active roster | | | Before |
| 5/18/1970 | KCR | Muser | Demoted to reserve roster | | | Before |
| 5/18/1970 | MIL | Duffy,F | Demoted to reserve roster | | | Before |
| 5/18/1970 | MIL | Luzinski | Demoted to reserve roster | | | Before |
| 5/18/1970 | OAK | Grieve | Promoted to active roster | | | Before |
| 5/18/1970 | SFG | Borbon | Demoted to reserve roster | | | Before |
| 5/18/1970 | SFG | Willoughby | Demoted to reserve roster | | | Before |
| 5/22/1970 | HOU | Sprague | Demoted to reserve roster | | | Before |
| 5/22/1970 | KCR | Miller,R | Demoted to reserve roster | | | Before |
| 5/22/1970 | KCR | Thomas | Demoted to reserve roster | | | Before |
| 5/22/1970 | SDP | Brye | Demoted to reserve roster | | | Before |
| 6/1/1970 | BOS | Howard,L | Demoted to reserve roster | | | Before |
| 6/1/1970 | BOS | McCarver | Promoted to active roster | | | Before |
| 6/1/1970 | CHC | Cooper | Demoted to reserve roster | | | Before |
| 6/1/1970 | CHC | Lamont | Demoted to reserve roster | | | Before |
| 6/1/1970 | CIN | Ellsworth,D | Demoted to reserve roster | | | Before |
| 6/1/1970 | CIN | O'Brien,B | Signed | | | Before |
| 6/1/1970 | CLE | Darwin | Demoted to reserve roster | | | Before |
| 6/1/1970 | KCR | Brown,Os | Demoted to reserve roster | | | Before |
| 6/1/1970 | MON | Hovley,S | Demoted to reserve roster | | | Before |
| 6/1/1970 | SFG | Gibbs | Demoted to reserve roster | | | Before |
| 6/3/1970 | MIL | Gagliano | Demoted to reserve roster | | | Before |
| 6/5/1970 | KCR | Mason,J | Demoted to reserve roster | | | Before |
| 6/8/1970 | KCR | Edwards,D | Demoted to reserve roster | | | Before |
| 6/8/1970 | KCR | Hutto | Signed | | | Before |
| 6/8/1970 | SDP | Burda,B | Signed | | | Before |
| 6/8/1970 | SDP | Cowan | Demoted to reserve roster | | | Before |
| 6/8/1970 | SDP | Moeller | Demoted to reserve roster | | | Before |
| 6/10/1970 | KCR | Stennett | Demoted to reserve roster | | | Before |
| 6/15/1970 | CIN | Humphreys,B | Signed | | | Before |
| 6/15/1970 | CIN | O'Brien,B | Demoted to reserve roster | | | Before |
| 6/15/1970 | KCR | Jeter | Demoted to reserve roster | | | Before |
| 6/15/1970 | KCR | Rosario | Signed | | | Before |
| 6/15/1970 | MIL | Chaney | Demoted to reserve roster | | | Before |
| 6/15/1970 | MIL | Hernandez,E | Signed | | | Before |
| 6/19/1970 | KCR | Smith,W | Signed | | | Before |
| 6/19/1970 | KCR | Snyder | Released | | | Before |
| 6/19/1970 | KCR | Snyder | Signed | | | Before |
| 6/19/1970 | KCR | Tepedino,F | Demoted to reserve roster | | | Before |
| 6/22/1970 | CLE | Seelbach | Demoted to reserve roster | | | Before |
| 6/22/1970 | MIL | Mayberry | Demoted to reserve roster | | | Before |
| 6/24/1970 | BAL | North | Demoted to reserve roster | | | Before |
| 6/29/1970 | BOS | Howard,L | Promoted to active roster | | | Before |
| 6/29/1970 | BOS | Ratliff | Demoted to reserve roster | | | Before |
| 6/29/1970 | BOS | Reberger | Demoted to reserve roster | | | Before |
| 6/29/1970 | CIN | Queen | Demoted to reserve roster | | | Before |
| 6/29/1970 | CIN | Thompson,M | Signed | | | Before |
| 6/29/1970 | MIL | Martinez,B | Demoted to reserve roster | | | Before |
| 6/29/1970 | PHI | Davalillo | Demoted to reserve roster | | | Before |
| 7/3/1970 | SDP | Ferraro | Demoted to reserve roster | | | Before |
| 7/6/1970 | CAA | Beene | Demoted to reserve roster | | | Before |
| 7/6/1970 | PHI | Alvarado | Signed | | | Before |
| 7/6/1970 | PHI | Oates | Demoted to reserve roster | | | Before |
| 7/6/1970 | STL | Allen,B | Demoted to reserve roster | | | Before |
| 7/6/1970 | WSH | Jones,D | Demoted to reserve roster | | | Before |
| 7/7/1970 | MON | Boccabella | Traded away | | | Before |
| 7/8/1970 | MIL | Rivers | Demoted to reserve roster | | | Before |
| 7/10/1970 | MIL | Herbel,R | Demoted to reserve roster | | | Before |
| 7/10/1970 | MIL | May,J | Demoted to reserve roster | | | Before |
| 7/10/1970 | MIL | Rudolph | Signed | | | Before |
| 7/16/1970 | ATL | McRae,N | Signed | | | Before |
| 7/16/1970 | BAL | Mason,D | Signed | | | Before |
| 7/16/1970 | BOS | Pavletich | Signed | | | Before |
| 7/16/1970 | BOS | Ratliff | Promoted to active roster | | | Before |
| 7/16/1970 | CAA | Nye,R | Signed | | | Before |
| 7/16/1970 | CHC | Ellsworth,D | Signed | | | Before |
| 7/16/1970 | CHC | Smith,B | Signed | | | Before |
| 7/16/1970 | CIN | Swanson | Signed | | | Before |
| 7/16/1970 | DET | Ford | Signed | | | Before |
| 7/16/1970 | HOU | O'Brien,B | Signed | | | Before |
| 7/16/1970 | MIL | Stewart | Signed | | | Before |
| 7/16/1970 | MIN | Doyle,P | Signed | | | Before |
| 7/16/1970 | MON | Compton | Signed | | | Before |
| 7/16/1970 | MON | Davison | Released | | | Before |
| 7/16/1970 | MON | Davison | Signed | | | Before |
| 7/16/1970 | OAK | Anderson,M | Demoted to reserve roster | | | Before |
| 7/16/1970 | OAK | Mitchell | Signed | | | Before |
| 7/16/1970 | PIT | Breeden,D | Released | | | Before |
| 7/16/1970 | PIT | Breeden,D | Released | | | Before |
| 7/16/1970 | PIT | Breeden,D | Signed | | | Before |
| 7/16/1970 | PIT | Breeden,D | Signed | | | Before |
| 7/16/1970 | PIT | Breeden,H | Signed | | | Before |
| 7/16/1970 | STL | Auerbach | Signed | | | Before |
| 7/16/1970 | STL | Versalles | Signed | | | Before |
| 7/19/1970 | CAA | Waslewski,G | Demoted to reserve roster | | | Before |
| 7/19/1970 | CAA | Wenz | Signed | | | Before |
| 7/19/1970 | CIN | Moore,B | Signed | | | Before |
| 7/19/1970 | DET | Gardner,R | Signed | | | Before |
| 7/19/1970 | HOU | Strahler | Signed | | | Before |
| 7/19/1970 | KCR | LaGrow | Demoted to reserve roster | | | Before |
| 7/19/1970 | KCR | Maye,L | Signed | | | Before |
| 7/19/1970 | MIL | Scheinblum | Demoted to reserve roster | | | Before |
| 7/19/1970 | MIL | Snyder | Signed | | | Before |
| 7/19/1970 | OAK | Pfeil | Signed | | | Before |
| 7/19/1970 | PHI | Gibson,R | Signed | | | Before |
| 7/19/1970 | PIT | Tischinski | Signed | | | Before |
| 7/19/1970 | SFG | Pagan | Signed | | | Before |
| 7/22/1970 | ATL | Ballinger | Demoted to reserve roster | | | Before |
| 7/22/1970 | CHW | Sorrell | Signed | | | Before |
| 7/22/1970 | CIN | Tompkins | Signed | | | Before |
| 7/22/1970 | CLE | May,M | Demoted to reserve roster | | | Before |
| 7/22/1970 | CLE | Ortiz | Signed | | | Before |
| 7/22/1970 | CLE | Reynolds,T | Signed | | | Before |
| 7/22/1970 | DET | Gardner,R | Released | | | Before |
| 7/22/1970 | DET | Gardner,R | Released | | | Before |
| 7/22/1970 | DET | Gardner,R | Released | | | Before |
| 7/22/1970 | DET | Gardner,R | Released | | | Before |
| 7/22/1970 | DET | Gardner,R | Released | | | Before |
| 7/22/1970 | DET | Gardner,R | Signed | | | Before |
| 7/22/1970 | DET | Gardner,R | Signed | | | Before |
| 7/22/1970 | DET | Gardner,R | Signed | | | Before |
| 7/22/1970 | DET | Gardner,R | Signed | | | Before |
| 7/22/1970 | DET | Gardner,R | Signed | | | Before |
| 7/22/1970 | DET | McQueen | Released | | | Before |
| 7/22/1970 | DET | McQueen | Signed | | | Before |
| 7/22/1970 | DET | Moeller | Signed | | | Before |
| 7/22/1970 | DET | Queen | Released | | | Before |
| 7/22/1970 | DET | Queen | Signed | | | Before |
| 7/22/1970 | KCR | Slocum | Signed | | | Before |
| 7/22/1970 | KCR | Valentine | Demoted to reserve roster | | | Before |
| 7/22/1970 | MIL | Vukovich | Signed | | | Before |
| 7/22/1970 | OAK | Tatum,J | Signed | | | Before |
| 7/22/1970 | PHI | Breeden,D | Signed | | | Before |
| 7/22/1970 | PHI | Gardner,R | Released | | | Before |
| 7/22/1970 | PHI | Gardner,R | Signed | | | Before |
| 7/22/1970 | PHI | Gardner,R | Demoted to reserve roster | | | Before |
| 7/22/1970 | PHI | Hamilton | Demoted to reserve roster | | | Before |
| 7/22/1970 | PHI | Herrmann | Demoted to reserve roster | | | Before |
| 7/22/1970 | PHI | Morales,J | Demoted to reserve roster | | | Before |
| 7/22/1970 | PHI | Motton | Signed | | | Before |
| 7/22/1970 | PIT | Queen | Signed | | | Before |
| 7/25/1970 | CIN | Cambria | Signed | | | Before |
| 7/25/1970 | KCR | Clark,Ri | Demoted to reserve roster | | | Before |
| 7/25/1970 | MIL | Bates | Signed | | | Before |
| 7/25/1970 | MON | Crowley | Demoted to reserve roster | | | Before |
| 7/25/1970 | MON | Jorgensen | Demoted to reserve roster | | | Before |
| 7/25/1970 | OAK | Bourque | Signed | | | Before |
| 7/25/1970 | SFG | Hansen | Demoted to reserve roster | | | Before |
| 7/28/1970 | CAA | Schofield | Demoted to reserve roster | | | Before |
| 7/28/1970 | CHW | Hinton | Demoted to reserve roster | | | Before |
| 7/28/1970 | CIN | Arnold | Signed | | | Before |
| 7/28/1970 | DET | Renick | Released | | | Before |
| 7/28/1970 | LAD | Didier | Demoted to reserve roster | | | Before |
| 7/28/1970 | NYM | Baldwin | Demoted to reserve roster | | | Before |
| 7/28/1970 | OAK | Plummer | Signed | | | Before |
| 7/28/1970 | STL | Humphrey | Signed | | | Before |
| 7/28/1970 | STL | Renick | Signed | | | Before |
| 7/31/1970 | BOS | Bertaina | Signed | | | Before |
| 7/31/1970 | CHC | Weis | Signed | | | Before |
| 7/31/1970 | CLE | Brinkman,C | Signed | | | Before |
| 7/31/1970 | MIL | Joseph | Signed | | | Before |
| 7/31/1970 | MIL | Maddox | Demoted to reserve roster | | | Before |
| 7/31/1970 | NYM | Montgomery,M | Demoted to reserve roster | | | Before |
| 7/31/1970 | STL | Cruz | Demoted to reserve roster | | | Before |
| 8/3/1970 | BOS | Davenport | Signed | | | Before |
| 8/3/1970 | BOS | Fisk | Demoted to reserve roster | | | Before |
| 8/3/1970 | BOS | Herbel,R | Signed | | | Before |
| 8/3/1970 | CHC | Comer,W | Signed | | | Before |
| 8/3/1970 | CHC | Lamont | Promoted to active roster | | | Before |
| 8/3/1970 | CHC | Weaver | Signed | | | Before |
| 8/3/1970 | CIN | Arnold | Demoted to reserve roster | | | Before |
| 8/3/1970 | CLE | Anderson,D | Signed | | | Before |
| 8/3/1970 | DET | Campanis | Signed | | | Before |
| 8/3/1970 | DET | Ford | Demoted to reserve roster | | | Before |
| 8/3/1970 | DET | Gardner,R | Demoted to reserve roster | | | Before |
| 8/3/1970 | OAK | Anderson,M | Promoted to active roster | | | Before |
| 8/3/1970 | OAK | Bourque | Demoted to reserve roster | | | Before |
| 8/3/1970 | OAK | Grieve | Demoted to reserve roster | | | Before |
| 8/3/1970 | OAK | Twitchell | Promoted to active roster | | | Before |
| 8/3/1970 | PHI | Davalillo | Promoted to active roster | | | Before |
| 8/3/1970 | PHI | Hamilton | Promoted to active roster | | | Before |
| 8/3/1970 | PIT | Breeden,H | Demoted to reserve roster | | | Before |
| 8/3/1970 | PIT | Fanzone | Signed | | | Before |
| 8/3/1970 | SDP | Voss | Demoted to reserve roster | | | Before |
| 8/4/1970 | CIN | Luebber | Signed | | | Before |
| 8/4/1970 | CIN | Luebber | Demoted to reserve roster | | | Before |
| 8/4/1970 | CIN | Thompson,M | Demoted to reserve roster | | | Before |
| 8/4/1970 | CIN | Tompkins | Demoted to reserve roster | | | Before |
| 8/4/1970 | CIN | Tompkins | Promoted to active roster | | | Before |
| 8/4/1970 | SDP | Spiezio | Demoted to reserve roster | | | Before |
| 8/5/1970 | CHC | Denehy | Signed | | | Before |
| 8/5/1970 | CHC | Lamont | Demoted to reserve roster | | | Before |
| 8/5/1970 | KCR | Carrithers | Demoted to reserve roster | | | Before |
| 8/5/1970 | SFG | Robles | Signed | | | Before |
| 8/7/1970 | KCR | Curtis | Demoted to reserve roster | | | Before |
| 8/7/1970 | KCR | Haydel | Signed | | | Before |
| 8/7/1970 | SDP | Baker,FJr | Signed | | | Before |
| 8/7/1970 | SDP | Paciorek | Demoted to reserve roster | | | Before |
| 8/8/1970 | BOS | Howard,L | Demoted to reserve roster | | | Before |
| 8/8/1970 | DET | Neibauer | Demoted to reserve roster | | | Before |
| 8/8/1970 | KCR | Bouton | Signed | | | Before |
| 8/8/1970 | KCR | DiLauro | Signed | | | Before |
| 8/8/1970 | KCR | Hutto | Demoted to reserve roster | | | Before |
| 8/8/1970 | KCR | Leonhard | Demoted to reserve roster | | | Before |
| 8/8/1970 | KCR | McCormick,M | Signed | | | Before |
| 8/8/1970 | KCR | Priddy | Signed | | | Before |
| 8/8/1970 | KCR | Smith,W | Demoted to reserve roster | | | Before |
| 8/8/1970 | KCR | Taylor,B | Released | | | Before |
| 8/8/1970 | KCR | Taylor,B | Signed | | | Before |
| 8/8/1970 | KCR | Taylor,H | Signed | | | Before |
| 8/8/1970 | MON | Gogolewski | Demoted to reserve roster | | | Before |
| 8/8/1970 | SDP | Beauchamp | Signed | | | Before |
| 8/8/1970 | SDP | Spriggs | Signed | | | Before |
| 8/8/1970 | SDP | Valdespino | Signed | | | Before |
| 8/10/1970 | BOS | Allison | Signed | | | Before |
| 8/10/1970 | BOS | McCarver | Demoted to reserve roster | | | Before |
| 8/10/1970 | MON | Allen,H | Signed | | | Before |
| 8/10/1970 | MON | Price | Demoted to reserve roster | | | Before |
| 8/10/1970 | NYY | Phillips,A | Demoted to reserve roster | | | Before |
| 8/10/1970 | PHI | Davalillo | Demoted to reserve roster | | | Before |
| 8/11/1970 | MON | Mashore | Signed | | | Before |
| 8/12/1970 | CHW | Davis,T | Demoted to reserve roster | | | Before |
| 8/12/1970 | LAD | Briggs | Demoted to reserve roster | | | Before |
| 8/12/1970 | MON | Richard,L | Demoted to reserve roster | | | Before |
| 8/12/1970 | PHI | Bravo | Signed | | | Before |
| 8/13/1970 | HOU | Sudakis | Demoted to reserve roster | | | Before |
| 8/14/1970 | WSH | Reed,B | Demoted to reserve roster | | | Before |
| 8/15/1970 | BOS | Ratliff | Demoted to reserve roster | | | Before |
| 8/15/1970 | KCR | Slocum | Demoted to reserve roster | | | Before |
| 8/15/1970 | KCR | Staehle | Signed | | | Before |
| 8/15/1970 | LAD | Harrelson,K | Demoted to reserve roster | | | Before |
| 8/15/1970 | LAD | Harrelson,K | Promoted to active roster | | | Before |
| 8/15/1970 | LAD | Ward,P | Demoted to reserve roster | | | Before |
| 8/17/1970 | BOS | Kusnyer | Signed | | | Before |
| 8/17/1970 | CHC | Banks | Demoted to reserve roster | | | Before |
| 8/17/1970 | CIN | Aaron,T | Signed | | | Before |
| 8/17/1970 | CIN | Swanson | Demoted to reserve roster | | | Before |
| 8/18/1970 | ATL | Lamb,J | Demoted to reserve roster | | | Before |
| 8/18/1970 | BAL | Keough | Demoted to reserve roster | | | Before |
| 8/18/1970 | CIN | Aaron,T | Signed | | | Before |
| 8/18/1970 | CIN | Swanson | Demoted to reserve roster | | | Before |
| 8/18/1970 | DET | Ellis,J | Demoted to reserve roster | | | Before |
| 8/18/1970 | KCR | Fitzmorris | Demoted to reserve roster | | | Before |
| 8/18/1970 | MIL | Rudolph | Demoted to reserve roster | | | Before |
| 8/18/1970 | MON | Chiles | Demoted to reserve roster | | | Before |
| 8/18/1970 | MON | Nelson,J | Demoted to reserve roster | | | Before |
| 8/18/1970 | NYM | Briles | Demoted to reserve roster | | | Before |
| 8/19/1970 | MIL | Lee,L | Demoted to reserve roster | | | Before |
| 8/19/1970 | NYM | Robertson,B | Demoted to reserve roster | | | Before |
| 8/19/1970 | SDP | Hilgendorf | Demoted to reserve roster | | | Before |
| 8/20/1970 | KCR | Rosario | Demoted to reserve roster | | | Before |
| 8/20/1970 | MIN | Dempsey | Demoted to reserve roster | | | Before |
| 8/20/1970 | MIN | Strickland | Demoted to reserve roster | | | Before |
| 8/20/1970 | MON | Thompson | Signed | | | Before |
| 8/20/1970 | WSH | Fiore,M | Signed | | | Before |
| 8/22/1970 | CLE | Bevacqua | Demoted to reserve roster | | | Before |
| 8/22/1970 | MIL | Stewart | Demoted to reserve roster | | | Before |
| 8/24/1970 | BOS | Fisk | Promoted to active roster | | | Before |
| 8/24/1970 | BOS | McCarver | Promoted to active roster | | | Before |
| 8/24/1970 | CHC | Banks | Promoted to active roster | | | Before |
| 8/24/1970 | CHC | Cooper | Promoted to active roster | | | Before |
| 8/24/1970 | CIN | Swanson | Released | | | Before |
| 8/24/1970 | OAK | Swanson | Signed | | | Before |
| 8/24/1970 | OAK | Swanson | Signed | | | Before |
| 8/24/1970 | OAK | Tatum,J | Demoted to reserve roster | | | Before |
| 8/24/1970 | PHI | Baylor | Demoted to reserve roster | | | Before |
| 8/24/1970 | PHI | Davalillo | Promoted to active roster | | | Before |
| 8/24/1970 | PHI | Herrmann | Promoted to active roster | | | Before |
| 8/24/1970 | PHI | Reynolds,B | Demoted to reserve roster | | | Before |
| 8/25/1970 | KCR | Brown,J | Demoted to reserve roster | | | Before |
| 8/26/1970 | MIL | Blefary | Demoted to reserve roster | | | Before |
| 8/26/1970 | MIL | Harrison | Signed | | | Before |
| 8/26/1970 | MON | Morehead | Demoted to reserve roster | | | Before |
| 8/27/1970 | NYM | Acosta | Demoted to reserve roster | | | Before |
| 8/28/1970 | BAL | Etchebarren | Demoted to reserve roster | | | Before |
| 8/28/1970 | CIN | Fahey | Signed | | | Before |
| 8/28/1970 | CIN | Fahey | Demoted to reserve roster | | | Before |
| 8/28/1970 | CIN | Tompkins | Demoted to reserve roster | | | Before |
| 8/28/1970 | KCR | DiLauro | Demoted to reserve roster | | | Before |
| 8/28/1970 | KCR | Spence | Signed | | | Before |
| 8/28/1970 | PHI | Davalillo | Demoted to reserve roster | | | Before |
| 8/31/1970 | CAA | Splittorff | Demoted to reserve roster | | | Before |
| 8/31/1970 | CHW | Horlen | Demoted to reserve roster | | | Before |
| 8/31/1970 | MIL | Lopez | Demoted to reserve roster | | | Before |
| 8/31/1970 | MIL | Quilici | Signed | | | Before |
| 8/31/1970 | SDP | Stone,S | Demoted to reserve roster | | | Before |
| 8/31/1970 | STL | Ryan,N | Demoted to reserve roster | | | Before |
| 9/2/1970 | MIL | Bates | Demoted to reserve roster | | | Before |
| 9/2/1970 | MON | Hershberger | Demoted to reserve roster | | | Before |
| 9/2/1970 | MON | Jones,M | Demoted to reserve roster | | | Before |
| 9/2/1970 | SFG | Brown,I | Demoted to reserve roster | | | Before |
| 9/3/1970 | DET | Pena,O | Demoted to reserve roster | | | Before |
| 9/3/1970 | SDP | Matlack | Demoted to reserve roster | | | Before |
| 9/4/1970 | SDP | Decker | Demoted to reserve roster | | | Before |
| 9/5/1970 | MIN | Watt | Demoted to reserve roster | | | Before |
| 9/7/1970 | CIN | Hall,D | Demoted to reserve roster | | | Before |
| 9/7/1970 | CIN | Hosley | Signed | | | Before |
| 9/7/1970 | CIN | Spinks | Promoted to active roster | | | Before |
| 9/7/1970 | KCR | Taylor,H | Demoted to reserve roster | | | Before |
| 9/7/1970 | MIL | Ellis,R | Signed | | | Before |
| 9/7/1970 | MIL | Gladding | Demoted to reserve roster | | | Before |
| 9/7/1970 | MON | Tompkins | Signed | | | Before |
| 9/7/1970 | OAK | Laxton | Signed | | | Before |
| 9/7/1970 | OAK | Laxton | Demoted to reserve roster | | | Before |
| 9/7/1970 | OAK | Pfeil | Demoted to reserve roster | | | Before |
| 9/7/1970 | PHI | Davalillo | Promoted to active roster | | | Before |
| 9/7/1970 | SDP | Shellenback | Demoted to reserve roster | | | Before |
| 9/8/1970 | BOS | McCarver | Demoted to reserve roster | | | Before |
| 9/8/1970 | SDP | Garber | Demoted to reserve roster | | | Before |
| 9/8/1970 | SDP | Hassler | Demoted to reserve roster | | | Before |
| 9/8/1970 | SDP | Morris | Demoted to reserve roster | | | Before |
| 9/8/1970 | WSH | Vance | Demoted to reserve roster | | | Before |
| 9/9/1970 | MIL | Griffin,T | Demoted to reserve roster | | | Before |
| 9/9/1970 | NYM | Bell | Demoted to reserve roster | | | Before |
| 9/9/1970 | SDP | Murphy,D | Signed | | | Before |
| 9/9/1970 | SDP | Patterson | Signed | | | Before |
| 9/9/1970 | STL | Tillman | Demoted to reserve roster | | | Before |
| 9/10/1970 | MON | Colbert,V | Demoted to reserve roster | | | Before |
| 9/10/1970 | SDP | Billings | Demoted to reserve roster | | | Before |
| 9/11/1970 | CLE | May,M | Promoted to active roster | | | Before |
| 9/11/1970 | KCR | Alou,J | Demoted to reserve roster | | | Before |
| 9/11/1970 | KCR | Goossen,G | Signed | | | Before |
| 9/11/1970 | WSH | Montgomery,B | Demoted to reserve roster | | | Before |
| 9/14/1970 | ATL | Hutto | Signed | | | Before |
| 9/14/1970 | BOS | Reberger | Promoted to active roster | | | Before |
| 9/14/1970 | CAA | Scott | Demoted to reserve roster | | | Before |
| 9/14/1970 | KCR | Ross | Demoted to reserve roster | | | Before |
| 9/14/1970 | MIL | Garman | Demoted to reserve roster | | | Before |
| 9/14/1970 | MIN | Doyle,P | Demoted to reserve roster | | | Before |
| 9/14/1970 | MIN | House | Demoted to reserve roster | | | Before |
| 9/14/1970 | MIN | Pfeil | Signed | | | Before |
| 9/14/1970 | MIN | Sims | Demoted to reserve roster | | | Before |
| 9/14/1970 | NYM | Odom | Demoted to reserve roster | | | Before |
| 9/14/1970 | OAK | Haney | Signed | | | Before |
| 9/14/1970 | OAK | Phoebus | Demoted to reserve roster | | | Before |
| 9/14/1970 | SDP | Folkers | Demoted to reserve roster | | | Before |
| 9/14/1970 | SDP | Strohmayer | Demoted to reserve roster | | | Before |
| 9/14/1970 | SDP | Washburn | Signed | | | Before |
| 9/14/1970 | STL | Thomas,D | Demoted to reserve roster | | | Before |
| 9/15/1970 | OAK | Phoebus | Demoted to reserve roster | | | Before |
| 9/16/1970 | ATL | Richard,JR | Demoted to reserve roster | | | Before |
| 9/16/1970 | CHC | Cooper | Demoted to reserve roster | | | Before |
| 9/16/1970 | PHI | Herrmann | Demoted to reserve roster | | | Before |
| 9/16/1970 | SDP | Valdespino | Demoted to reserve roster | | | Before |
| 9/17/1970 | BOS | Torres | Demoted to reserve roster | | | Before |
| 9/17/1970 | CAA | Kingman | Demoted to reserve roster | | | Before |
| 9/17/1970 | CLE | Ortiz | Demoted to reserve roster | | | Before |
| 9/17/1970 | CLE | Williams,W | Demoted to reserve roster | | | Before |
| 9/17/1970 | MON | Campisi | Demoted to reserve roster | | | Before |
| 9/17/1970 | PHI | Johnstone | Demoted to reserve roster | | | Before |
| 9/17/1970 | STL | Sadecki | Demoted to reserve roster | | | Before |
| 9/18/1970 | LAD | Grimsley | Demoted to reserve roster | | | Before |
| 9/18/1970 | LAD | Mikkelsen | Demoted to reserve roster | | | Before |
| 9/18/1970 | NYY | Garrett,W | Demoted to reserve roster | | | Before |
| 9/19/1970 | HOU | Slaton | Demoted to reserve roster | | | Before |
| 9/21/1970 | BAL | Barber,SD | Demoted to reserve roster | | | Before |
| 9/21/1970 | BOS | Camilli | Signed | | | Before |
| 9/21/1970 | BOS | Roseboro | Demoted to reserve roster | | | Before |
| 9/21/1970 | CHC | Moses | Demoted to reserve roster | | | Before |
| 9/21/1970 | CHW | Geronimo | Demoted to reserve roster | | | Before |
| 9/21/1970 | CHW | Hooton | Demoted to reserve roster | | | Before |
| 9/21/1970 | HOU | Jones,C | Demoted to reserve roster | | | Before |
| 9/21/1970 | MIL | Kelley,T | Demoted to reserve roster | | | Before |
| 9/21/1970 | MON | Morales,R | Demoted to reserve roster | | | Before |
| 9/21/1970 | NYY | Martinez,T | Demoted to reserve roster | | | Before |
| 9/21/1970 | OAK | Grieve | Promoted to active roster | | | Before |
| 9/21/1970 | OAK | Lopez | Signed | | | Before |
| 9/21/1970 | OAK | Morton | Demoted to reserve roster | | | Before |
| 9/21/1970 | OAK | Swanson | Demoted to reserve roster | | | Before |
| 9/21/1970 | PHI | Gibson,R | Demoted to reserve roster | | | Before |
| 9/21/1970 | PHI | Motton | Demoted to reserve roster | | | Before |
| 9/21/1970 | SDP | Hough | Demoted to reserve roster | | | Before |
| 9/22/1970 | MIL | Cullen | Demoted to reserve roster | | | Before |
| 9/23/1970 | CLE | Bevacqua | Promoted to active roster | | | Before |
| 9/23/1970 | CLE | Williams,W | Promoted to active roster | | | Before |
| 9/23/1970 | LAD | Marshall,D | Demoted to reserve roster | | | Before |
| 9/23/1970 | NYY | Gosger | Demoted to reserve roster | | | Before |
| 9/23/1970 | OAK | Hendrick | Demoted to reserve roster | | | Before |
| 9/23/1970 | PHI | Herrmann | Promoted to active roster | | | Before |
| 9/23/1970 | PHI | Johnstone | Promoted to active roster | | | Before |
| 9/23/1970 | PHI | Morales,J | Promoted to active roster | | | Before |
| 9/23/1970 | WSH | Monday | Demoted to reserve roster | | | Before |
| 9/24/1970 | CHC | Dalrymple | Demoted to reserve roster | | | Before |
| 9/24/1970 | KCR | Foster,G | Demoted to reserve roster | | | Before |
| 9/24/1970 | KCR | Lasher,F | Demoted to reserve roster | | | Before |
| 9/24/1970 | KCR | Tatum | Signed | | | Before |
| 9/24/1970 | MON | Fairey | Demoted to reserve roster | | | Before |
| 9/24/1970 | OAK | Mitchell | Demoted to reserve roster | | | Before |
| 9/24/1970 | PHI | Herrmann | Demoted to reserve roster | | | Before |
| 9/24/1970 | PIT | Clemente | Demoted to reserve roster | | | Before |
| 9/25/1970 | CHC | Hiatt | Demoted to reserve roster | | | Before |
| 9/25/1970 | WSH | McKinney | Demoted to reserve roster | | | Before |
| 9/26/1970 | ATL | Duncan | Demoted to reserve roster | | | Before |
| 9/26/1970 | CHC | Gelnar | Demoted to reserve roster | | | Before |
| 9/26/1970 | CLE | Bevacqua | Demoted to reserve roster | | | Before |
| 9/26/1970 | LAD | Ryan,M | Demoted to reserve roster | | | Before |
| 9/26/1970 | MIL | Taylor,B | Signed | | | Before |
| 9/26/1970 | MIL | Walton | Demoted to reserve roster | | | Before |
| 9/26/1970 | STL | Day | Demoted to reserve roster | | | Before |
| 9/26/1970 | WSH | York | Demoted to reserve roster | | | Before |
| 9/28/1970 | ATL | Brand | Demoted to reserve roster | | | Before |
| 9/28/1970 | CHC | Giusti | Demoted to reserve roster | | | Before |
| 9/28/1970 | CHW | Hall,T | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Berry | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Bradley | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Brinkman,E | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Carbo | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Chambliss | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Colbert,N | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Grzenda | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Haller | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | John | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | May,M | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | McDowell | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Perry,J | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Singer | Demoted to reserve roster | | | Before |
| 9/28/1970 | CLE | Williams,W | Demoted to reserve roster | | | Before |
| 9/28/1970 | HOU | Pepitone | Demoted to reserve roster | | | Before |
| 9/28/1970 | MIL | Dal Canton | Demoted to reserve roster | | | Before |
| 9/28/1970 | MIL | Joseph | Demoted to reserve roster | | | Before |
| 9/28/1970 | MIL | Matias | Signed | | | Before |
| 9/28/1970 | NYY | Taylor,T | Demoted to reserve roster | | | Before |
| 9/28/1970 | OAK | Barr | Demoted to reserve roster | | | Before |
| 9/28/1970 | PHI | Davalillo | Demoted to reserve roster | | | Before |
| 9/28/1970 | PHI | Johnstone | Demoted to reserve roster | | | Before |
| 9/29/1970 | CHC | Francona,T | Demoted to reserve roster | | | Before |
| 9/30/1970 | ATL | Newman | Demoted to reserve roster | | | Before |
| 9/30/1970 | CHC | Grabarkewitz | Demoted to reserve roster | | | Before |
| 9/30/1970 | CIN | Nelson,R | Demoted to reserve roster | | | Before |
| 9/30/1970 | CLE | Brinkman,C | Demoted to reserve roster | | | Before |
| 9/30/1970 | LAD | Santorini | Demoted to reserve roster | | | Before |
| 9/30/1970 | LAD | Webster | Demoted to reserve roster | | | Before |
| 10/1/1970 | ATL | Ballinger | Promoted to active roster | | | Before |
| 10/1/1970 | ATL | Brand | Promoted to active roster | | | Before |
| 10/1/1970 | ATL | Duncan | Promoted to active roster | | | Before |
| 10/1/1970 | ATL | Lamb,J | Promoted to active roster | | | Before |
| 10/1/1970 | ATL | Newman | Promoted to active roster | | | Before |
| 10/1/1970 | ATL | Richard,JR | Promoted to active roster | | | Before |
| 10/1/1970 | BOS | Fisk | Demoted to reserve roster | | | Before |
| 10/1/1970 | CLE | Berry | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Bevacqua | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Bradley | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Brinkman,C | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Brinkman,E | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Capra | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Carbo | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Chambliss | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Colbert,N | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Darwin | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Grzenda | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Haller | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | John | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | May,M | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | McDowell | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Ortiz | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Perry,J | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Singer | Promoted to active roster | | | Before |
| 10/1/1970 | CLE | Williams,W | Promoted to active roster | | | Before |
| 10/1/1970 | DET | Kaline | Demoted to reserve roster | | | Before |
| 10/1/1970 | LAD | Butler | Demoted to reserve roster | | | Before |
| 10/1/1970 | MIN | Dempsey | Promoted to active roster | | | Before |
| 10/1/1970 | MIN | House | Promoted to active roster | | | Before |
| 10/1/1970 | MIN | Sims | Promoted to active roster | | | Before |
| 10/1/1970 | MIN | Strickland | Promoted to active roster | | | Before |
| 10/1/1970 | MIN | Watt | Promoted to active roster | | | Before |
| 10/1/1970 | MON | Kosco | Demoted to reserve roster | | | Before |
| 10/1/1970 | PHI | Baylor | Promoted to active roster | | | Before |
| 10/1/1970 | PHI | Davalillo | Promoted to active roster | | | Before |
| 10/1/1970 | PHI | Gibson,R | Promoted to active roster | | | Before |
| 10/1/1970 | PHI | Herrmann | Promoted to active roster | | | Before |
| 10/1/1970 | PHI | Johnstone | Promoted to active roster | | | Before |
| 10/1/1970 | PHI | Motton | Promoted to active roster | | | Before |
| 10/1/1970 | PHI | Oates | Promoted to active roster | | | Before |
| 10/1/1970 | SDP | Scherman | Demoted to reserve roster | | | Before |
| 10/3/1970 | CLE | Brinkman,C | Demoted to reserve roster | | | Before |
| 10/3/1970 | CLE | Capra | Demoted to reserve roster | | | Before |
| 10/3/1970 | CLE | Darwin | Demoted to reserve roster | | | Before |
| 10/3/1970 | CLE | Joshua | Demoted to reserve roster | | | Before |
| 10/3/1970 | LAD | Briggs | Promoted to active roster | | | Before |
| 10/3/1970 | LAD | Butler | Promoted to active roster | | | Before |
| 10/3/1970 | LAD | Didier | Promoted to active roster | | | Before |
| 10/3/1970 | LAD | Grimsley | Promoted to active roster | | | Before |
| 10/3/1970 | LAD | Marshall,D | Promoted to active roster | | | Before |
| 10/3/1970 | LAD | Mikkelsen | Promoted to active roster | | | Before |
| 10/3/1970 | LAD | Ryan,M | Promoted to active roster | | | Before |
| 10/3/1970 | LAD | Santorini | Promoted to active roster | | | Before |
| 10/3/1970 | LAD | Ward,P | Promoted to active roster | | | Before |
| 10/3/1970 | LAD | Webster | Promoted to active roster | | | Before |
| 10/3/1970 | PHI | Baylor | Demoted to reserve roster | | | Before |
| 10/3/1970 | PHI | Baylor | Promoted to active roster | | | Before |
| 10/3/1970 | PHI | Breeden,D | Demoted to reserve roster | | | Before |
| 10/3/1970 | PHI | Greif | Demoted to reserve roster | | | Before |
| 10/3/1970 | PHI | Oates | Demoted to reserve roster | | | Before |
| 10/3/1970 | PHI | Parker,H | Demoted to reserve roster | | | Before |
| 10/3/1970 | PHI | Wilcox | Demoted to reserve roster | | | Before |
| 10/3/1970 | PHI | Woodson | Demoted to reserve roster | | | Before |
| 10/4/1970 | PHI | Grant,J | Demoted to reserve roster | | | Before |
| 10/6/1970 | ATL | McRae,N | Demoted to reserve roster | | | Before |
| 10/7/1970 | MIN | Kison | Demoted to reserve roster | | | Before |
| 10/7/1970 | MIN | Milner | Demoted to reserve roster | | | Before |
| 10/9/1970 | MIN | Pfeil | Demoted to reserve roster | | | Before |
| 10/15/1970 | ATL | Rader,Da | Demoted to reserve roster | | | Before |