Orioles Roster & Staff
Transactions
| Date | Transaction |
| 05/31/25 | Baltimore Orioles designated C Chadwick Tromp for assignment. |
| 05/31/25 | Baltimore Orioles placed 1B Ryan Mountcastle on the 10-day injured list. Right hamstring strain. |
| 05/31/25 | Baltimore Orioles selected the contract of RF Jordyn Adams from Norfolk Tides. |
| 05/31/25 | Baltimore Orioles recalled 3B Coby Mayo from Norfolk Tides. |
| 05/31/25 | Baltimore Orioles sent LHP Cionel Pérez outright to Norfolk Tides. |
| 05/30/25 | Baltimore Orioles signed free agent LF Cooper Hummel. |
| 05/30/25 | Baltimore Orioles placed CF Cedric Mullins on the 10-day injured list retroactive to May 29, 2025. Right hamstring strain. |
| 05/30/25 | Baltimore Orioles transferred RHP Cody Poteet from the 15-day injured list to the 60-day injured list. Right shoulder inflammation. |
| 05/29/25 | Baltimore Orioles sent 3B Jordan Westburg on a rehab assignment to Norfolk Tides. |
| 05/29/25 | Baltimore Orioles sent LF Colton Cowser on a rehab assignment to Norfolk Tides. |
| 05/29/25 | Baltimore Orioles sent LF Cooper Hummel outright to Norfolk Tides. |
| 05/28/25 | Baltimore Orioles signed free agent RHP Angel De Jesus to a minor league contract. |
| 05/28/25 | Baltimore Orioles selected the contract of RHP Matt Bowman from Norfolk Tides. |
| 05/28/25 | Baltimore Orioles optioned RHP Yaramil Hiraldo to Norfolk Tides. |
| 05/27/25 | Baltimore Orioles sent 2B Terrin Vavra outright to Norfolk Tides. |
| 05/26/25 | Baltimore Orioles designated LF Cooper Hummel for assignment. |
| 05/26/25 | Baltimore Orioles selected the contract of C Chadwick Tromp from Norfolk Tides. |
| 05/25/25 | Baltimore Orioles designated 2B Terrin Vavra for assignment. |
| 05/25/25 | Baltimore Orioles signed free agent LF Cooper Hummel. |
| 05/25/25 | Baltimore Orioles optioned LHP Trevor Rogers to Norfolk Tides. |
| 05/24/25 | Baltimore Orioles placed LF Ramón Laureano on the 10-day injured list retroactive to May 21, 2025. Left ankle sprain. |
| 05/24/25 | Baltimore Orioles designated LHP Cionel Pérez for assignment. |
| 05/24/25 | Baltimore Orioles recalled LHP Trevor Rogers from Norfolk Tides. |
| 05/24/25 | Baltimore Orioles selected the contract of 2B Terrin Vavra from Norfolk Tides. |
| 05/24/25 | Baltimore Orioles selected the contract of RHP Yaramil Hiraldo from Norfolk Tides. |
| 05/22/25 | Baltimore Orioles sent LF Colton Cowser on a rehab assignment to Aberdeen IronBirds. |
| 05/22/25 | Baltimore Orioles sent LF Colton Cowser on a rehab assignment to Aberdeen IronBirds. |
| 05/22/25 | Baltimore Orioles sent LF Colton Cowser on a rehab assignment to Aberdeen IronBirds. |
| 05/22/25 | Baltimore Orioles signed free agent RHP Edwin Marte to a minor league contract. |
| 05/21/25 | Baltimore Orioles signed free agent RHP Carlos Virla to a minor league contract. |
| 05/21/25 | Baltimore Orioles activated RHP Andrew Kittredge from the 15-day injured list. |
| 05/21/25 | Baltimore Orioles optioned RHP Chayce McDermott to Norfolk Tides. |
| 05/20/25 | Baltimore Orioles released RHP Kyle Gibson. |
| 05/20/25 | Baltimore Orioles recalled RHP Chayce McDermott from Norfolk Tides. |
| 05/20/25 | Baltimore Orioles optioned RHP Kade Strowd to Norfolk Tides. |
| 05/18/25 | Baltimore Orioles placed RF Tyler O'Neill on the 10-day injured list retroactive to May 16, 2025. Left shoulder impingement. |
| 05/18/25 | Baltimore Orioles designated RHP Kyle Gibson for assignment. |
| 05/18/25 | Baltimore Orioles recalled RHP Kade Strowd from Norfolk Tides. |
| 05/18/25 | Baltimore Orioles recalled LF Dylan Carlson from Norfolk Tides. |
| 05/16/25 | Baltimore Orioles signed free agent Deimer Rodriguez to a minor league contract. |
| 05/15/25 | Baltimore Orioles optioned RHP Chayce McDermott to Norfolk Tides. |
| 05/14/25 | Baltimore Orioles activated 3B Ramón Urías from the 10-day injured list. |
| 05/14/25 | Baltimore Orioles signed free agent RHP Asael Arias to a minor league contract. |
| 05/14/25 | Baltimore Orioles recalled RHP Chayce McDermott from Norfolk Tides. |
| 05/14/25 | Baltimore Orioles optioned LF Dylan Carlson to Norfolk Tides. |
| 05/11/25 | Baltimore Orioles activated RHP Zach Eflin from the 15-day injured list. |
| 05/11/25 | Baltimore Orioles optioned LHP Trevor Rogers to Norfolk Tides. |
| 05/11/25 | Baltimore Orioles optioned RHP Colin Selby to Norfolk Tides. |
| 05/10/25 | Baltimore Orioles sent RHP Matt Bowman outright to Norfolk Tides. |
| 05/09/25 | Baltimore Orioles activated RF Tyler O'Neill from the 10-day injured list. |
| 05/09/25 | Baltimore Orioles optioned 3B Coby Mayo to Norfolk Tides. |
| 05/09/25 | Baltimore Orioles sent LHP Walter Pennington outright to Norfolk Tides. |
| 05/08/25 | Baltimore Orioles sent RHP Andrew Kittredge on a rehab assignment to Norfolk Tides. |
| 05/08/25 | Baltimore Orioles sent RHP Andrew Kittredge on a rehab assignment to Norfolk Tides. |
| 05/08/25 | Baltimore Orioles designated RHP Matt Bowman for assignment. |
| 05/08/25 | Baltimore Orioles recalled RHP Colin Selby from Norfolk Tides. |
| 05/08/25 | Seattle Mariners traded RHP Luis F. Castillo to Baltimore Orioles for cash. |
| 05/07/25 | Baltimore Orioles designated LHP Walter Pennington for assignment. |
| 05/07/25 | Baltimore Orioles signed free agent RHP Ezequiel Sosa to a minor league contract. |
| 05/06/25 | Baltimore Orioles sent RF Tyler O'Neill on a rehab assignment to Norfolk Tides. |
| 05/04/25 | Baltimore Orioles sent RHP Andrew Kittredge on a rehab assignment to Aberdeen IronBirds. |
| 05/04/25 | Baltimore Orioles activated RHP Chayce McDermott from the 15-day injured list. |
| 05/04/25 | Baltimore Orioles sent RHP Zach Eflin on a rehab assignment to Aberdeen IronBirds. |
| 05/04/25 | Baltimore Orioles optioned RHP Chayce McDermott to Norfolk Tides. |
| 05/03/25 | Baltimore Orioles placed 3B Ramón Urías on the 10-day injured list retroactive to May 1, 2025. Right hamstring strain. |
| 05/03/25 | Baltimore Orioles sent RHP Chayce McDermott on a rehab assignment to Norfolk Tides. |
| 05/03/25 | Baltimore Orioles recalled 3B Coby Mayo from Norfolk Tides. |