Orioles Roster & Staff
Transactions
| Date | Transaction |
| 08/31/15 | Baltimore Orioles sent RHP Chaz Roe on a rehab assignment to Bowie Baysox. |
| 08/29/15 | Baltimore Orioles signed free agent RHP Alex Wells to a minor league contract. |
| 08/28/15 | Baltimore Orioles optioned RHP Jorge Rondon to Norfolk Tides. |
| 08/28/15 | Baltimore Orioles activated C Steve Clevenger from the paternity list. |
| 08/28/15 | Baltimore Orioles selected the contract of Dariel Alvarez from Norfolk Tides. |
| 08/28/15 | Baltimore Orioles optioned LF Henry Urrutia to Norfolk Tides. |
| 08/28/15 | Baltimore Orioles signed free agent C Jean Alvarado to a minor league contract. |
| 08/28/15 | Baltimore Orioles signed free agent 3B Bryan Ciriaco to a minor league contract. |
| 08/28/15 | Baltimore Orioles signed free agent OF Malek Joubas to a minor league contract. |
| 08/27/15 | Baltimore Orioles sent RHP Mike Wright on a rehab assignment to Norfolk Tides. |
| 08/27/15 | Baltimore Orioles signed free agent SS Kipper Briceno to a minor league contract. |
| 08/27/15 | Baltimore Orioles sent LF Nolan Reimold outright to Norfolk Tides. |
| 08/27/15 | Baltimore Orioles signed free agent SS Jose Sanchez to a minor league contract. |
| 08/25/15 | Baltimore Orioles sent Eddie Gamboa outright to Norfolk Tides. |
| 08/25/15 | Baltimore Orioles selected the contract of SS Paul Janish from Norfolk Tides. |
| 08/25/15 | Baltimore Orioles placed C Steve Clevenger on the paternity list. |
| 08/24/15 | Baltimore Orioles activated 1B Steve Pearce from the 15-day disabled list. |
| 08/24/15 | Baltimore Orioles recalled Jorge Rondon from Norfolk Tides. |
| 08/24/15 | Baltimore Orioles designated Nolan Reimold for assignment. |
| 08/24/15 | Baltimore Orioles signed free agent SS Frank Gonzalez to a minor league contract. |
| 08/24/15 | Baltimore Orioles placed SS J.J. Hardy on the 15-day disabled list. Left groin strain |
| 08/24/15 | Baltimore Orioles signed free agent C Fernando Ayala to a minor league contract. |
| 08/24/15 | Baltimore Orioles signed free agent C Carlos Mendez to a minor league contract. |
| 08/23/15 | Baltimore Orioles sent LF David Lough outright to Norfolk Tides. |
| 08/22/15 | Baltimore Orioles sent 1B Steve Pearce on a rehab assignment to Bowie Baysox. |
| 08/20/15 | Baltimore Orioles sent LF Steve Pearce on a rehab assignment to GCL Orioles. |
| 08/19/15 | Baltimore Orioles signed free agent LHP Mike Belfiore to a minor league contract. |
| 08/15/15 | Baltimore Orioles optioned RF Junior Lake to Norfolk Tides. |
| 08/15/15 | Baltimore Orioles recalled Henry Urrutia from Norfolk Tides. |
| 08/15/15 | Baltimore Orioles released LF Travis Snider. |
| 08/14/15 | Baltimore Orioles recalled C Steve Clevenger from Norfolk Tides. |
| 08/14/15 | Baltimore Orioles designated LF David Lough for assignment. |
| 08/11/15 | Cincinnati Reds traded RHP Matt Buschmann to Baltimore Orioles for cash. |
| 08/10/15 | Baltimore Orioles placed RHP Chaz Roe on the 15-day disabled list. Right shoulder tendinitis. |
| 08/10/15 | Baltimore Orioles recalled RHP Mychal Givens from Bowie Baysox. |
| 08/09/15 | Baltimore Orioles signed free agent RHP Gillian Wernet to a minor league contract. |
| 08/09/15 | Baltimore Orioles signed free agent LHP Nick Additon to a minor league contract. |
| 08/08/15 | Baltimore Orioles released RHP Bud Norris. |
| 08/08/15 | Baltimore Orioles sent 1B Chris Parmelee outright to Norfolk Tides. |
| 08/07/15 | Baltimore Orioles recalled Junior Lake from Norfolk Tides. |
| 08/07/15 | Baltimore Orioles designated LF Travis Snider for assignment. |
| 08/06/15 | Baltimore Orioles optioned RHP Mychal Givens to Bowie Baysox. |
| 08/06/15 | Baltimore Orioles activated RHP Jason Garcia from the 60-day disabled list. |
| 08/04/15 | Baltimore Orioles recalled LHP T.J. McFarland from Norfolk Tides. |
| 08/04/15 | Baltimore Orioles signed free agent RHP Andrew Robinson to a minor league contract. |
| 08/04/15 | Baltimore Orioles placed RHP Tyler Wilson on the 15-day disabled list. Left oblique strain |
| 08/03/15 | Baltimore Orioles optioned RHP Jorge Rondon to Norfolk Tides. |
| 08/03/15 | Baltimore Orioles recalled RHP Tyler Wilson from Norfolk Tides. |
| 08/02/15 | Baltimore Orioles signed free agent LHP Sean Bierman to a minor league contract. |
| 08/01/15 | Baltimore Orioles placed RHP Mike Wright on the 15-day disabled list. left calf strain |
| 08/01/15 | Baltimore Orioles recalled Jorge Rondon from Norfolk Tides. |