Orioles Roster & Staff
Transactions
| Date | Transaction |
| 06/30/15 | Baltimore Orioles signed LHP Will Shepley. |
| 06/30/15 | Baltimore Orioles signed RHP Steven Klimek. |
| 06/30/15 | Baltimore Orioles signed LHP Xavier Borde. |
| 06/30/15 | Baltimore Orioles signed RHP Kory Groves. |
| 06/29/15 | Baltimore Orioles signed RHP Rocky McCord. |
| 06/29/15 | Baltimore Orioles optioned T.J. McFarland to Norfolk Tides. |
| 06/29/15 | Baltimore Orioles signed Jason Heinrich. |
| 06/29/15 | Baltimore Orioles signed RHP Michael Costello. |
| 06/29/15 | Baltimore Orioles signed LHP Nick Vespi. |
| 06/28/15 | Baltimore Orioles recalled T.J. McFarland from Norfolk Tides. |
| 06/28/15 | Baltimore Orioles signed CF D.J. Stewart. |
| 06/26/15 | Baltimore Orioles signed LHP Will Dennis. |
| 06/26/15 | Baltimore Orioles recalled LHP Wei-Yin Chen from Frederick Keys. |
| 06/26/15 | Baltimore Orioles optioned LHP T.J. McFarland to Norfolk Tides. |
| 06/26/15 | Baltimore Orioles signed LHP Reid Love. |
| 06/26/15 | Baltimore Orioles signed RHP Christian Turnipseed. |
| 06/26/15 | Baltimore Orioles signed RHP Jay Flaa. |
| 06/25/15 | Baltimore Orioles signed free agent RHP Juan Taveras to a minor league contract. |
| 06/25/15 | Baltimore Orioles activated RHP Miguel Gonzalez from the 15-day disabled list. |
| 06/25/15 | Baltimore Orioles optioned RHP Mychal Givens to Bowie Baysox. |
| 06/25/15 | Baltimore Orioles signed 1B Seamus Curran. |
| 06/24/15 | Baltimore Orioles signed free agent OF Tristan Omeasoo to a minor league contract. |
| 06/24/15 | Baltimore Orioles recalled T.J. McFarland from Norfolk Tides. |
| 06/24/15 | Baltimore Orioles optioned RHP Oliver Drake to Norfolk Tides. |
| 06/23/15 | Baltimore Orioles signed free agent 2B Tanner Witt to a minor league contract. |
| 06/22/15 | Baltimore Orioles signed 2B Jack Graham. |
| 06/22/15 | Baltimore Orioles signed 2B Frank Crinella. |
| 06/22/15 | Baltimore Orioles signed SS Branden Becker. |
| 06/22/15 | Baltimore Orioles signed RF Jaylen Ferguson. |
| 06/21/15 | Baltimore Orioles optioned RHP Kevin Gausman to Norfolk Tides. |
| 06/21/15 | Baltimore Orioles recalled Oliver Drake from Norfolk Tides. |
| 06/20/15 | Baltimore Orioles signed RHP Gray Fenter. |
| 06/20/15 | Baltimore Orioles selected the contract of Mychal Givens from Bowie Baysox. |
| 06/20/15 | Baltimore Orioles optioned RHP Tyler Wilson to Norfolk Tides. |
| 06/20/15 | Kevin Gausman roster status changed by Baltimore Orioles. |
| 06/20/15 | Baltimore Orioles transferred RHP Jason Garcia from the 15-day disabled list to the 60-day disabled list. Right shoulder tendinitis |
| 06/20/15 | Baltimore Orioles optioned RHP Mike Wright to Norfolk Tides. |
| 06/20/15 | Baltimore Orioles sent RHP Miguel Gonzalez on a rehab assignment to Bowie Baysox. |
| 06/20/15 | Baltimore Orioles signed LHP Garrett Cleavinger. |
| 06/19/15 | Baltimore Orioles sent 2B Jonathan Schoop on a rehab assignment to Bowie Baysox. |
| 06/19/15 | Baltimore Orioles signed OF Cedric Mullins. |
| 06/19/15 | Baltimore Orioles signed 1B Steve Laurino. |
| 06/19/15 | Baltimore Orioles signed C Stuart Levy. |
| 06/19/15 | Baltimore Orioles signed C Jerry McClanahan. |
| 06/19/15 | Baltimore Orioles signed free agent LHP Oscar Cabrera to a minor league contract. |
| 06/19/15 | Baltimore Orioles signed 2B Drew Turbin. |
| 06/19/15 | Baltimore Orioles signed OF MIke Odenwaelder. |
| 06/17/15 | Baltimore Orioles signed RHP Ryan Meisinger. |
| 06/17/15 | Baltimore Orioles signed LHP Robert Strader. |
| 06/17/15 | Baltimore Orioles signed RHP Andrew Elliot. |
| 06/16/15 | Baltimore Orioles signed SS Ryan Mountcastle. |
| 06/16/15 | Baltimore Orioles signed free agent 1B Corban Joseph to a minor league contract. |
| 06/16/15 | Baltimore Orioles sent RHP Kevin Gausman on a rehab assignment to Frederick Keys. |
| 06/16/15 | Baltimore Orioles transferred 2B Jonathan Schoop from the 15-day disabled list to the 60-day disabled list. Partially torn right knee ligament |
| 06/16/15 | Baltimore Orioles optioned LHP Wei-Yin Chen to Frederick Keys. |
| 06/16/15 | Baltimore Orioles selected the contract of 1B Chris Parmelee from Norfolk Tides. |
| 06/15/15 | Baltimore Orioles sent LHP Wesley Wright on a rehab assignment to Norfolk Tides. |
| 06/14/15 | Baltimore Orioles activated LHP Brian Matusz. |
| 06/14/15 | Baltimore Orioles recalled Tyler Wilson from Norfolk Tides. |
| 06/14/15 | Baltimore Orioles optioned LHP T.J. McFarland to Norfolk Tides. |
| 06/13/15 | Baltimore Orioles released SS Everth Cabrera. |
| 06/12/15 | Baltimore Orioles signed free agent C Wagner Ramirez to a minor league contract. |
| 06/11/15 | Baltimore Orioles recalled Mike Wright from Norfolk Tides. |
| 06/11/15 | Baltimore Orioles placed RHP Miguel Gonzalez on the 15-day disabled list retroactive to June 10, 2015. right groin strain |
| 06/11/15 | Baltimore Orioles sent RHP Kevin Gausman on a rehab assignment to Bowie Baysox. |
| 06/09/15 | Baltimore Orioles signed free agent RHP Juan Hernandez to a minor league contract. |
| 06/09/15 | Baltimore Orioles selected the contract of RF Nolan Reimold from Norfolk Tides. |
| 06/09/15 | Baltimore Orioles optioned LHP Cesar Cabral to Norfolk Tides. |
| 06/09/15 | Baltimore Orioles signed free agent RHP Hector Guance to a minor league contract. |
| 06/07/15 | Baltimore Orioles optioned 2B Rey Navarro to Norfolk Tides. |
| 06/07/15 | Baltimore Orioles activated RHP Bud Norris from the 15-day disabled list. |
| 06/05/15 | Baltimore Orioles designated SS Everth Cabrera for assignment. |
| 06/05/15 | Baltimore Orioles selected the contract of Cesar Cabral from Norfolk Tides. |
| 06/05/15 | Baltimore Orioles optioned C Steve Clevenger to Norfolk Tides. |
| 06/05/15 | Baltimore Orioles optioned RHP Mike Wright to Norfolk Tides. |
| 06/05/15 | Baltimore Orioles activated C Matt Wieters from the 60-day disabled list. |
| 06/05/15 | Baltimore Orioles recalled Rey Navarro from Norfolk Tides. |
| 06/05/15 | LHP Brian Matusz roster status changed by Baltimore Orioles. |
| 06/04/15 | Baltimore Orioles sent RHP Kevin Gausman on a rehab assignment to Frederick Keys. |
| 06/03/15 | Baltimore Orioles recalled T.J. McFarland from Norfolk Tides. |
| 06/03/15 | Baltimore Orioles traded LF Alejandro De Aza and cash to Boston Red Sox for RHP Joe Gunkel. |
| 06/03/15 | Baltimore Orioles traded LF Alejandro De Aza and cash to Boston Red Sox for RHP Joe Gunkel. |
| 06/03/15 | Baltimore Orioles optioned RHP Oliver Drake to Norfolk Tides. |
| 06/02/15 | Baltimore Orioles sent C Matt Wieters on a rehab assignment to Norfolk Tides. |
| 06/02/15 | Baltimore Orioles sent RHP Bud Norris on a rehab assignment to Norfolk Tides. |