| Transactions | ||||||
| Date | Team | Player | Type | OthTm | EffDate | When |
| 4/12/1926 | OM | Haines | Placed on Injured List |   | 4/8/1926 | Before |
| 4/12/1926 | OM | McNamara | Promoted to active roster |   |   | Before |
| 5/6/1926 | BS | Dixon | Placed on Injured List |   | 5/6/1926 | Before |
| 5/6/1926 | OM | Haines | Activated from Injured List |   |   | Before |
| 5/6/1926 | OM | McNamara | Demoted to reserve roster |   |   | Before |
| 5/12/1926 | NO | Austin | Promoted to active roster |   |   | Before |
| 5/12/1926 | NO | Lehr | Demoted to reserve roster |   |   | Before |
| 5/12/1926 | OM | Adams,Spe | Released |   |   | Before |
| 5/12/1926 | OM | Adams,Spe | Signed |   |   | Before |
| 5/12/1926 | OM | McNamara | Released |   |   | Before |
| 5/12/1926 | OM | Williams,L | Signed |   |   | Before |
| 5/12/1926 | OM | Williams,L | Demoted to reserve roster |   |   | Before |
| 5/29/1926 | NO | Boehler | Traded away | BG |   | After |
| 5/29/1926 | NO | Critz | Acquired via trade | BG |   | After |
| 5/29/1926 | NO | Huntzinger,W | Acquired via trade | BG |   | After |
| 5/29/1926 | NO | O'Farrell | Acquired via trade | BG |   | After |
| 5/29/1926 | NO | Stephenson | Traded away | BG |   | After |
| 5/29/1926 | NO | Taylor,Z | Traded away | BG |   | After |
| 5/30/1926 | BS | Dixon | Activated from Injured List |   |   | Before |
| 6/16/1926 | NO | Smith,S | Acquired via trade | OM |   | After |
| 6/16/1926 | OM | Smith,S | Traded away | NO |   | After |
| 6/17/1926 | NO | Austin | Released |   |   | Before |
| 6/17/1926 | OM | Cox,L | Signed |   |   | Before |
| 6/29/1926 | BS | Paschal | Placed on Injured List |   | 6/22/1926 | Before |
| 6/29/1926 | NO | Edwards,F | Demoted to reserve roster |   |   | Before |
| 6/29/1926 | NO | Hill | Demoted to reserve roster |   |   | Before |
| 6/29/1926 | NO | Kimmick | Promoted to active roster |   |   | Before |
| 6/29/1926 | OM | Cox,L | Released |   |   | Before |
| 6/29/1926 | OM | Geygan | Signed |   |   | Before |
| 6/29/1926 | OM | Geygan | Demoted to reserve roster |   |   | Before |
| 7/1/1926 | Alt | Roush | Traded away | DBL |   | After |
| 7/1/1926 | Alt | Ruel | Traded away | DBL |   | After |
| 7/1/1926 | BS | Kamm | Traded away | DBL |   | After |
| 7/1/1926 | BS | Ruth | Traded away | DBL |   | After |
| 7/1/1926 | BS | Uhle | Traded away | DBL |   | After |
| 7/1/1926 | KS | Bottomley | Traded away | DBL |   | After |
| 7/1/1926 | KS | Gautreau | Traded away | DBL |   | After |
| 7/1/1926 | KS | Lyons | Traded away | DBL |   | After |
| 7/1/1926 | Mac | Bell,L | Traded away | DBL |   | After |
| 7/1/1926 | Mac | Kremer | Traded away | DBL |   | After |
| 7/1/1926 | Mac | Petty | Traded away | DBL |   | After |
| 7/1/1926 | Mid | Bush,G | Traded away | DBL |   | After |
| 7/1/1926 | Mid | Gehringer | Traded away | DBL |   | After |
| 7/1/1926 | Mid | Goslin | Traded away | DBL |   | After |
| 7/1/1926 | Mid | Hunnefield | Traded away | DBL |   | After |
| 7/1/1926 | NO | O'Farrell | Traded away | DBL |   | After |
| 7/1/1926 | NO | Quinn | Traded away | DBL |   | After |
| 7/1/1926 | NO | Waner | Traded away | DBL |   | After |
| 7/1/1926 | OM | Grove | Traded away | DBL |   | After |
| 7/1/1926 | SM | Jacobson,W | Traded away | DBL |   | After |
| 7/1/1926 | SM | Rigney | Traded away | DBL |   | After |
| 7/4/1926 | Alt | Roush | Acquired via trade | DBL |   | After |
| 7/4/1926 | Alt | Ruel | Acquired via trade | DBL |   | After |
| 7/4/1926 | BS | Kamm | Acquired via trade | DBL |   | After |
| 7/4/1926 | BS | Ruth | Acquired via trade | DBL |   | After |
| 7/4/1926 | BS | Uhle | Acquired via trade | DBL |   | After |
| 7/4/1926 | KS | Bottomley | Acquired via trade | DBL |   | After |
| 7/4/1926 | KS | Gautreau | Acquired via trade | DBL |   | After |
| 7/4/1926 | KS | Lyons | Acquired via trade | DBL |   | After |
| 7/4/1926 | Mac | Bell,L | Acquired via trade | DBL |   | After |
| 7/4/1926 | Mac | Kremer | Acquired via trade | DBL |   | After |
| 7/4/1926 | Mac | Petty | Acquired via trade | DBL |   | After |
| 7/4/1926 | Mid | Bush,G | Acquired via trade | DBL |   | After |
| 7/4/1926 | Mid | Gehringer | Acquired via trade | DBL |   | After |
| 7/4/1926 | Mid | Goslin | Acquired via trade | DBL |   | After |
| 7/4/1926 | Mid | Hunnefield | Acquired via trade | DBL |   | After |
| 7/4/1926 | NO | O'Farrell | Acquired via trade | DBL |   | After |
| 7/4/1926 | NO | Quinn | Acquired via trade | DBL |   | After |
| 7/4/1926 | NO | Waner | Acquired via trade | DBL |   | After |
| 7/4/1926 | OM | Grove | Acquired via trade | DBL |   | After |
| 7/4/1926 | SM | Jacobson,W | Acquired via trade | DBL |   | After |
| 7/4/1926 | SM | Rigney | Acquired via trade | DBL |   | After |
| 7/12/1926 | KS | Warner | Acquired via trade | Aus |   | After |
| 7/12/1926 | KS | Wrightstone | Traded away | Aus |   | After |
| 7/13/1926 | BS | Paschal | Activated from Injured List |   |   | Before |
| 7/13/1926 | KS | Maun | Demoted to reserve roster |   |   | Before |
| 7/19/1926 | OM | Dyer | Promoted to active roster |   |   | Before |
| 7/19/1926 | OM | Haines | Placed on Injured List |   | 7/15/1926 | Before |
| 7/19/1926 | OM | Kelly,M | Promoted to active roster |   |   | Before |
| 8/13/1926 | OM | Haines | Activated from Injured List |   |   | Before |
| 8/13/1926 | OM | Kelly,M | Demoted to reserve roster |   |   | Before |
| 8/26/2026 | Alt | Welsh | Acquired via trade | Aus |   | After |
| 8/28/2026 | BS | Farrell | Acquired via trade | Aus |   | After |
| 8/28/2026 | BS | Johnson | Acquired via trade | Aus |   | After |
| 8/28/2026 | BS | Paschal | Acquired via trade | Aus |   | After |
| 8/28/2026 | BS | Songer | Acquired via trade | Aus |   | After |
| 9/4/2026 | Alt | Blankenship | Acquired via trade | BB |   | After |
| 9/4/2026 | Alt | Coveleski | Acquired via trade | BB |   | After |
| 9/4/2026 | Alt | Dauss | Traded away | BB |   | After |
| 9/10/2026 | Mid | Cox,D | Acquired via trade | BB |   | After |
| 9/11/2026 | Alt | Reinhart | Traded away | Aus |   | After |
| 9/12/2026 | Alt | Peckinpaugh | Traded away | Aus |   | After |
| 9/12/2026 | Alt | Taylor,E | Acquired via trade | Aus |   | After |
| 9/24/2026 | Alt | Gibson,F | Acquired via trade | Aus |   | After |
| 9/24/2026 | Alt | Prothro | Traded away | Aus |   | After |