| Transactions |
| Date | Team | Player | Type | OthTm | EffDate | When |
| 4/26/1934 | NYN | Parmelee | Placed on disabled list | | | Before |
| 5/1/1934 | PhN | Oana | Demoted to reserve roster | | | Before |
| 5/1/1934 | SLN | Heise | Demoted to reserve roster | | | Before |
| 5/2/1934 | NYN | Thompson | Demoted to reserve roster | | | Before |
| 5/4/1934 | SLN | Healy | Acquired via trade | NYN | | Before |
| 5/7/1934 | Cin | Robello | Promoted to active roster | | | Before |
| 5/8/1934 | Pit | Blanton | Demoted to reserve roster | | | Before |
| 5/8/1934 | Pit | Brubaker | Demoted to reserve roster | | | Before |
| 5/8/1934 | Pit | Johnson | Demoted to reserve roster | | | Before |
| 5/9/1934 | Brk | Chapman | Demoted to reserve roster | | | Before |
| 5/10/1934 | PhN | Hopkins | Demoted to reserve roster | | | Before |
| 5/11/1934 | NYN | Salveson | Demoted to reserve roster | | | Before |
| 5/12/1934 | PhN | Elliott | Waived | | | Before |
| 5/12/1934 | Pit | Finney | Demoted to reserve roster | | | After |
| 5/12/1934 | SLN | Moore | Demoted to reserve roster | | | Before |
| 5/12/1934 | SLN | Riggs | Demoted to reserve roster | | | Before |
| 5/13/1934 | NYN | Leiber | Demoted to reserve roster | | | Before |
| 5/14/1934 | ChN | Nelson | Demoted to reserve roster | | | Before |
| 5/14/1934 | Cin | Robello | Demoted to reserve roster | | | Before |
| 5/15/1934 | BoN | Barrett | Demoted to reserve roster | | | Before |
| 5/15/1934 | Brk | Page | Demoted to reserve roster | | | Before |
| 5/15/1934 | ChN | Ward | Demoted to reserve roster | | | Before |
| 5/15/1934 | ChN | Weaver | Signed | | | Before |
| 5/15/1934 | Cin | Lindsey | Released | | | Before |
| 5/15/1934 | SLN | Grimes | Released | | | Before |
| 5/16/1934 | BoN | Elliott | Claimed on waivers | | | Before |
| 5/16/1934 | Cin | Johnson,Sy | Traded away | PhN | | Before |
| 5/16/1934 | Cin | Kleinhans | Acquired via trade | PhN | | Before |
| 5/16/1934 | Cin | Moore | Traded away | PhN | | Before |
| 5/16/1934 | Cin | Schulmerich | Acquired via trade | PhN | | Before |
| 5/16/1934 | PhN | Johnson | Acquired via trade | Cin | | Before |
| 5/16/1934 | PhN | Kleinhans | Traded away | Cin | | Before |
| 5/16/1934 | PhN | Moore,J | Acquired via trade | Cin | | Before |
| 5/16/1934 | PhN | Ruble | Traded away | Cin | | Before |
| 5/16/1934 | PhN | Schulmerich | Traded away | Cin | | Before |
| 5/22/1934 | Cin | Freitas | Signed | | | Before |
| 5/22/1934 | Cin | Pool | Promoted to active roster | | | Before |
| 5/22/1934 | Cin | Shiver | Demoted to reserve roster | | | Before |
| 5/24/1934 | BoN | Brown | Demoted to reserve roster | | | Before |
| 5/24/1934 | BoN | Mowry | Demoted to reserve roster | | | Before |
| 5/28/1934 | BoN | Zachary | Released | | | Before |
| 5/28/1934 | Cin | Shaute | Released | | | Before |
| 5/30/1934 | Brk | Smythe | Acquired via trade | NYA | | Before |
| 5/31/1934 | Brk | Hogg | Promoted to active roster | | | Before |
| 5/31/1934 | Brk | Perkins | Demoted to reserve roster | | | Before |
| 6/1/1934 | Cin | Flowers | Placed on disabled list | | | Before |
| 6/2/1934 | PhN | Clancy | Promoted to active roster | | | Before |
| 6/2/1934 | PhN | Pearce | Demoted to reserve roster | | | Before |