| Transactions | ||||||
| Date | Team | Player | Type | OthTm | EffDate | When |
| 3/6/2015 | End | Doolittle | Acquired via trade | SFR | After | |
| 3/6/2015 | End | Gray | Acquired via trade | SFR | After | |
| 3/6/2015 | SFR | Doolittle | Traded away | End | After | |
| 3/6/2015 | SFR | Gray | Traded away | End | After | |
| 3/17/2015 | ACS | Castillo,R | Traded away | SS | After | |
| 3/17/2015 | ACS | Kennedy | Acquired via trade | VD | After | |
| 3/17/2015 | ACS | Lawrie | Traded away | VD | After | |
| 3/17/2015 | ACS | Quintana | Traded away | VD | After | |
| 3/17/2015 | ACS | Shoemaker | Acquired via trade | SS | After | |
| 3/17/2015 | ACS | Valbuena | Acquired via trade | VD | After | |
| 3/17/2015 | SS | Castillo,R | Acquired via trade | ACS | After | |
| 3/17/2015 | SS | Shoemaker | Traded away | ACS | After | |
| 3/17/2015 | VD | Kennedy | Traded away | ACS | After | |
| 3/17/2015 | VD | Lawrie | Acquired via trade | ACS | After | |
| 3/17/2015 | VD | Quintana | Acquired via trade | ACS | After | |
| 3/17/2015 | VD | Valbuena | Traded away | ACS | After | |
| 3/19/2015 | PL | Altuve | Traded away | WN | After | |
| 3/19/2015 | PL | Headley | Acquired via trade | WN | After | |
| 3/19/2015 | PL | Hendricks | Acquired via trade | WN | After | |
| 3/19/2015 | PL | Moustakas | Traded away | WN | After | |
| 3/19/2015 | PL | Syndergaard | Acquired via trade | WN | After | |
| 3/19/2015 | PL | Vargas,J | Traded away | WN | After | |
| 3/19/2015 | WN | Altuve | Acquired via trade | PL | After | |
| 3/19/2015 | WN | Headley | Traded away | PL | After | |
| 3/19/2015 | WN | Hendricks | Traded away | PL | After | |
| 3/19/2015 | WN | Moustakas | Acquired via trade | PL | After | |
| 3/19/2015 | WN | Syndergaard | Traded away | PL | After | |
| 3/19/2015 | WN | Vargas,J | Acquired via trade | PL | After | |
| 3/22/2015 | AH | Glasnow | Demoted to reserve roster | Before | ||
| 3/22/2015 | AH | Talion | Demoted to reserve roster | Before | ||
| 3/22/2015 | End | Rodon | Demoted to reserve roster | Before | ||
| 3/22/2015 | End | Vargas,K | Demoted to reserve roster | Before | ||
| 3/22/2015 | FH | Bradley | Demoted to reserve roster | Before | ||
| 3/22/2015 | FH | Winker | Demoted to reserve roster | Before | ||
| 3/22/2015 | HS | Almora | Demoted to reserve roster | Before | ||
| 3/22/2015 | HS | Edwards | Demoted to reserve roster | Before | ||
| 3/22/2015 | HS | Schwarber | Demoted to reserve roster | Before | ||
| 3/22/2015 | HS | Van Slyke | Demoted to reserve roster | Before | ||
| 3/22/2015 | MSB | Johnson | Demoted to reserve roster | Before | ||
| 3/22/2015 | ShS | Gregorius | Promoted to active roster | Before | ||
| 3/22/2015 | ShS | Pence | Promoted to active roster | Before | ||