| Transactions |
| Date | Team | Player | Type | OthTm | EffDate | When |
| 4/18/1926 | Bos | Baumgartner | Demoted to reserve roster |   |   | Before |
| 4/18/1926 | Bos | Bolen | Promoted to active roster |   |   | Before |
| 4/18/1926 | Hob | Thomas,L | Promoted to active roster |   |   | Before |
| 4/18/1926 | Hob | Wingard | Placed on Injured List |   | 4/16/1926 | Before |
| 4/30/1926 | Aus | Brickell | Promoted to active roster |   |   | Before |
| 4/30/1926 | Aus | Mann | Demoted to reserve roster |   |   | Before |
| 4/30/1926 | Aus | Taylor,D | Promoted to active roster |   |   | Before |
| 4/30/1926 | Aus | Tolson | Demoted to reserve roster |   |   | Before |
| 5/6/1926 | Hob | Thomas,L | Demoted to reserve roster |   |   | Before |
| 5/6/1926 | Hob | Wingard | Activated from Injured List |   |   | Before |
| 5/18/1926 | Aus | Mann | Promoted to active roster |   |   | Before |
| 5/18/1926 | Aus | Taylor,D | Demoted to reserve roster |   |   | Before |
| 5/18/1926 | Aus | Tolson | Promoted to active roster |   |   | Before |
| 5/18/1926 | Aus | Vick | Demoted to reserve roster |   |   | Before |
| 5/18/1926 | Bos | Bolen | Demoted to reserve roster |   |   | Before |
| 5/18/1926 | Bos | Grabowski | Demoted to reserve roster |   |   | Before |
| 5/18/1926 | Bos | Ott | Promoted to active roster |   |   | Before |
| 5/18/1926 | Bos | Poetz | Promoted to active roster |   |   | Before |
| 5/24/1926 | Aus | Bengough | Placed on Injured List |   | 7/2/1926 | Before |
| 5/24/1926 | Aus | Vick | Promoted to active roster |   |   | Before |
| 5/24/1926 | Bos | Baumgartner | Promoted to active roster |   |   | Before |
| 5/24/1926 | Bos | Poetz | Demoted to reserve roster |   |   | Before |
| 5/29/1926 | BG | Boehler | Acquired via trade | NO |   | After |
| 5/29/1926 | BG | Critz | Traded away | NO |   | After |
| 5/29/1926 | BG | Huntzinger,W | Traded away | NO |   | After |
| 5/29/1926 | BG | O'Farrell | Traded away | NO |   | After |
| 5/29/1926 | BG | Stephenson | Acquired via trade | NO |   | After |
| 5/29/1926 | BG | Taylor,Z | Acquired via trade | NO |   | After |
| 5/30/1926 | BG | Cooper,W | Demoted to reserve roster |   |   | Before |
| 5/30/1926 | BG | Leverett | Promoted to active roster |   |   | Before |
| 6/5/1926 | Aus | Mann | Placed on Injured List |   | 5/31/1926 | Before |
| 6/5/1926 | Aus | Taylor,D | Promoted to active roster |   |   | Before |
| 6/5/1926 | Hob | Cronin | Promoted to active roster |   |   | Before |
| 6/5/1926 | Hob | Hargreaves | Placed on Injured List |   | 6/3/1926 | Before |
| 6/10/1926 | Aus | Blades | Acquired via trade | BG |   | After |
| 6/10/1926 | Aus | Tyson | Traded away | BG |   | After |
| 6/10/1926 | BG | Blades | Traded away | Aus |   | After |
| 6/10/1926 | BG | Tyson | Acquired via trade | Aus |   | After |
| 6/17/1926 | Aus | Lutzke | Placed on Injured List |   | 6/14/1926 | Before |
| 6/17/1926 | Aus | Mann | Activated from Injured List |   |   | Before |
| 6/17/1926 | Aus | Mullen | Promoted to active roster |   |   | Before |
| 6/17/1926 | Aus | Taylor,D | Demoted to reserve roster |   |   | Before |
| 6/17/1926 | Bos | Bolen | Promoted to active roster |   |   | Before |
| 6/17/1926 | Bos | Hearn | Placed on Injured List |   | 6/11/1926 | Before |
| 6/20/1926 | Hob | Cronin | Demoted to reserve roster |   |   | Before |
| 6/20/1926 | Hob | Hargreaves | Activated from Injured List |   |   | Before |
| 6/23/1926 | Bos | Bolen | Demoted to reserve roster |   |   | Before |
| 6/23/1926 | Bos | Poetz | Promoted to active roster |   |   | Before |
| 6/29/1926 | Aus | Lutzke | Activated from Injured List |   |   | Before |
| 6/29/1926 | Aus | Mullen | Demoted to reserve roster |   |   | Before |
| 7/1/1926 | Aus | Bancroft | Traded away | KBL |   | After |
| 7/1/1926 | Aus | Luque | Traded away | KBL |   | After |
| 7/1/1926 | Aus | Mostil | Traded away | KBL |   | After |
| 7/1/1926 | Aus | Schang | Traded away | KBL |   | After |
| 7/1/1926 | Aus | Williams,K | Traded away | KBL |   | After |
| 7/1/1926 | BB | Alexander,GC | Traded away | KBL |   | After |
| 7/1/1926 | BB | Collins,P | Traded away | KBL |   | After |
| 7/1/1926 | BB | Fothergill | Traded away | KBL |   | After |
| 7/1/1926 | BB | Hornsby | Traded away | KBL |   | After |
| 7/1/1926 | BG | Traynor | Traded away | KBL |   | After |
| 7/1/1926 | BG | Zachary | Traded away | KBL |   | After |
| 7/1/1926 | Bos | Gray | Traded away | KBL |   | After |
| 7/1/1926 | Bos | High | Traded away | KBL |   | After |
| 7/1/1926 | Hob | Jamieson | Traded away | KBL |   | After |
| 7/1/1926 | OL | Gehrig | Traded away | KBL |   | After |
| 7/1/1926 | OL | Root | Traded away | KBL |   | After |
| 7/1/1926 | OL | Smith,B | Traded away | KBL |   | After |
| 7/1/1926 | Top | Barrett | Traded away | KBL |   | After |
| 7/1/1926 | Top | Lindstrom | Traded away | KBL |   | After |
| 7/1/1926 | Wil | Collins,E | Traded away | KBL |   | After |
| 7/1/1926 | Wil | Speaker | Traded away | KBL |   | After |
| 7/4/1926 | Aus | Bancroft | Acquired via trade | KBL |   | After |
| 7/4/1926 | Aus | Luque | Acquired via trade | KBL |   | After |
| 7/4/1926 | Aus | Mostil | Acquired via trade | KBL |   | After |
| 7/4/1926 | Aus | Schang | Acquired via trade | KBL |   | After |
| 7/4/1926 | Aus | Williams,K | Acquired via trade | KBL |   | After |
| 7/4/1926 | BB | Alexander,GC | Acquired via trade | KBL |   | After |
| 7/4/1926 | BB | Collins,P | Acquired via trade | KBL |   | After |
| 7/4/1926 | BB | Fothergill | Acquired via trade | KBL |   | After |
| 7/4/1926 | BB | Hornsby | Acquired via trade | KBL |   | After |
| 7/4/1926 | BG | Traynor | Acquired via trade | KBL |   | After |
| 7/4/1926 | BG | Zachary | Acquired via trade | KBL |   | After |
| 7/4/1926 | Bos | Gray | Acquired via trade | KBL |   | After |
| 7/4/1926 | Bos | High | Acquired via trade | KBL |   | After |
| 7/4/1926 | Hob | Jamieson | Acquired via trade | KBL |   | After |
| 7/4/1926 | OL | Gehrig | Acquired via trade | KBL |   | After |
| 7/4/1926 | OL | Root | Acquired via trade | KBL |   | After |
| 7/4/1926 | OL | Smith,B | Acquired via trade | KBL |   | After |
| 7/4/1926 | Top | Barrett | Acquired via trade | KBL |   | After |
| 7/4/1926 | Top | Lindstrom | Acquired via trade | KBL |   | After |
| 7/4/1926 | Wil | Collins,E | Acquired via trade | KBL |   | After |
| 7/4/1926 | Wil | Speaker | Acquired via trade | KBL |   | After |
| 7/12/1926 | Aus | Warner | Traded away | KS |   | After |
| 7/12/1926 | Aus | Wrightstone | Acquired via trade | KS |   | After |
| 7/13/1926 | Bos | Bischoff | Demoted to reserve roster |   |   | Before |
| 7/13/1926 | Bos | Grabowski | Promoted to active roster |   |   | Before |
| 7/13/1926 | Bos | Poetz | Demoted to reserve roster |   |   | Before |
| 7/19/1926 | Aus | Bengough | Activated from Injured List |   |   | Before |
| 7/19/1926 | Aus | Vick | Demoted to reserve roster |   |   | Before |
| 7/25/1926 | Bos | Baumgartner | Demoted to reserve roster |   |   | Before |
| 7/25/1926 | Bos | Bolen | Promoted to active roster |   |   | Before |
| 7/25/1926 | Bos | Hearn | Activated from Injured List |   |   | Before |
| 8/1/1926 | Aus | Taylor,D | Promoted to active roster |   |   | Before |
| 8/1/1926 | Aus | Tolson | Placed on Injured List |   | 8/1/1926 | Before |
| 8/7/1926 | Bos | Bischoff | Promoted to active roster |   |   | Before |
| 8/7/1926 | Bos | Bolen | Demoted to reserve roster |   |   | Before |
| 8/7/1926 | Bos | Grabowski | Demoted to reserve roster |   |   | Before |
| 8/7/1926 | Bos | Poetz | Promoted to active roster |   |   | Before |
| 8/26/2026 | Aus | Welsh | Traded away | Alt |   | After |
| 8/27/2026 | Aus | Southworth,B | Acquired via trade | OL |   | After |
| 8/27/2026 | OL | Southworth,B | Traded away | Aus |   | After |
| 8/28/2026 | Aus | Farrell | Traded away | BS |   | After |
| 8/28/2026 | Aus | Johnson | Traded away | BS |   | After |
| 8/28/2026 | Aus | Paschal | Traded away | BS |   | After |
| 8/28/2026 | Aus | Songer | Traded away | BS |   | After |
| 9/1/2026 | Aus | Schang | Acquired via trade | Top |   | After |
| 9/1/2026 | Top | Schang | Traded away | Aus |   | After |
| 9/4/2026 | BB | Blankenship | Traded away | Alt |   | After |
| 9/4/2026 | BB | Coveleski | Traded away | Alt |   | After |
| 9/4/2026 | BB | Dauss | Acquired via trade | Alt |   | After |
| 9/10/2026 | BB | Cox,D | Traded away | Mid |   | After |
| 9/11/2026 | Aus | Reinhart | Acquired via trade | Alt |   | After |
| 9/11/2026 | BB | Smith,J | Traded away | Wil |   | After |
| 9/11/2026 | Wil | Smith,J | Acquired via trade | BB |   | After |
| 9/12/2026 | Aus | Peckinpaugh | Acquired via trade | Alt |   | After |
| 9/12/2026 | Aus | Taylor,E | Traded away | Alt |   | After |
| 9/24/2026 | Aus | Gibson,F | Traded away | Alt |   | After |
| 9/24/2026 | Aus | Prothro | Acquired via trade | Alt |   | After |