Orioles Roster & Staff
Transactions
| Date | Transaction |
| 06/30/18 | Baltimore Orioles sent RHP Chris Tillman on a rehab assignment to Norfolk Tides. |
| 06/29/18 | Baltimore Orioles optioned RHP Jimmy Yacabonis to Norfolk Tides. |
| 06/29/18 | Baltimore Orioles optioned RHP Yefry Ramirez to Norfolk Tides. |
| 06/29/18 | Baltimore Orioles signed OF Nick Horvath. |
| 06/29/18 | Baltimore Orioles transferred RHP Darren O'Day from the 10-day disabled list to the 60-day disabled list. Left hamstring strain. |
| 06/29/18 | Baltimore Orioles selected the contract of Ryan Meisinger from Norfolk Tides. |
| 06/29/18 | Baltimore Orioles designated Corban Joseph for assignment. |
| 06/29/18 | Baltimore Orioles selected the contract of LHP Paul Fry from Norfolk Tides. |
| 06/28/18 | Baltimore Orioles recalled Yefry Ramirez from Norfolk Tides. |
| 06/28/18 | Baltimore Orioles optioned C Austin Wynns to Norfolk Tides. |
| 06/28/18 | Baltimore Orioles optioned LHP Donnie Hart to Norfolk Tides. |
| 06/28/18 | Baltimore Orioles recalled Chance Sisco from Norfolk Tides. |
| 06/27/18 | Baltimore Orioles recalled Jimmy Yacabonis from Norfolk Tides. |
| 06/27/18 | Baltimore Orioles placed RHP Darren O'Day on the 10-day disabled list. Left hamstring strain. |
| 06/27/18 | Baltimore Orioles recalled 3B Steve Wilkerson from Norfolk Tides. |
| 06/27/18 | Baltimore Orioles placed RF Craig Gentry on the 10-day disabled list retroactive to June 24, 2018. Left rib fracture. |
| 06/27/18 | Baltimore Orioles signed RHP Yeancarlos Lleras. |
| 06/26/18 | Baltimore Orioles placed RHP Dylan Bundy on the 10-day disabled list. Left ankle sprain. |
| 06/26/18 | Baltimore Orioles signed RHP Ryan Conroy. |
| 06/26/18 | Baltimore Orioles signed SS Clay Fisher. |
| 06/26/18 | Baltimore Orioles recalled Donnie Hart from Norfolk Tides. |
| 06/25/18 | Baltimore Orioles signed C Cody Roberts. |
| 06/25/18 | Baltimore Orioles sent RHP Chris Tillman on a rehab assignment to Delmarva Shorebirds. |
| 06/25/18 | Baltimore Orioles activated 3B Tim Beckham from the 60-day disabled list. |
| 06/25/18 | Baltimore Orioles transferred 2B Luis Sardinas from the 10-day disabled list to the 60-day disabled list. Lower back strain. |
| 06/25/18 | Baltimore Orioles optioned LHP Donnie Hart to Norfolk Tides. |
| 06/23/18 | Baltimore Orioles recalled Donnie Hart from Norfolk Tides. |
| 06/23/18 | Baltimore Orioles optioned 3B Steve Wilkerson to Norfolk Tides. |
| 06/22/18 | Baltimore Orioles signed LHP Drew Rom. |
| 06/21/18 | Baltimore Orioles signed free agent RHP Reynier Montero to a minor league contract. |
| 06/21/18 | Baltimore Orioles optioned CF Joey Rickard to Norfolk Tides. |
| 06/21/18 | Baltimore Orioles activated RF Colby Rasmus from the 60-day disabled list. |
| 06/21/18 | Baltimore Orioles transferred LHP Richard Bleier from the 10-day disabled list to the 60-day disabled list. Left shoulder latissimus strain. |
| 06/21/18 | Baltimore Orioles signed LHP Nick Meservey. |
| 06/21/18 | Baltimore Orioles signed free agent RHP Jose A. Rodriguez to a minor league contract. |
| 06/20/18 | Baltimore Orioles activated RHP Andrew Cashner from the 10-day disabled list. |
| 06/20/18 | Baltimore Orioles sent RHP Chris Tillman on a rehab assignment to Aberdeen IronBirds. |
| 06/20/18 | Baltimore Orioles optioned 1B Corban Joseph to Bowie Baysox. |
| 06/20/18 | Baltimore Orioles sent 1B Pedro Alvarez outright to Norfolk Tides. |
| 06/20/18 | Baltimore Orioles signed 3B Trevor Putzig. |
| 06/20/18 | Baltimore Orioles signed SS John Ham. |
| 06/19/18 | Baltimore Orioles recalled C Caleb Joseph from Norfolk Tides. |
| 06/19/18 | Baltimore Orioles selected the contract of Steve Wilkerson from Norfolk Tides. |
| 06/19/18 | Baltimore Orioles sent 3B Tim Beckham on a rehab assignment to Norfolk Tides. |
| 06/19/18 | Baltimore Orioles designated 3B Pedro Alvarez for assignment. |
| 06/19/18 | Baltimore Orioles sent RF Colby Rasmus on a rehab assignment to Bowie Baysox. |
| 06/18/18 | Baltimore Orioles signed OF Trey Truitt. |
| 06/18/18 | Baltimore Orioles signed LHP Cody Hacker. |
| 06/18/18 | Baltimore Orioles signed RHP Dallas Litscher. |
| 06/18/18 | Baltimore Orioles signed C Jared Denning. |
| 06/18/18 | Baltimore Orioles signed RHP Parker McFadden. |
| 06/18/18 | Baltimore Orioles signed RHP Jayvien Sandridge. |
| 06/18/18 | Baltimore Orioles signed RHP Tyler Joyner. |
| 06/18/18 | Baltimore Orioles signed RHP Andrew Ciolli. |
| 06/18/18 | Baltimore Orioles signed OF Trey Whitley. |
| 06/18/18 | Baltimore Orioles signed 1B Ian Evans. |
| 06/18/18 | Baltimore Orioles signed LHP Kevin Magee. |
| 06/18/18 | Baltimore Orioles signed RHP Jake Zebron. |
| 06/18/18 | Baltimore Orioles signed OF Andrew Jayne. |
| 06/18/18 | Baltimore Orioles signed C Matt Beaird. |
| 06/18/18 | Baltimore Orioles signed LHP Jason Montville. |
| 06/17/18 | Baltimore Orioles optioned C Chance Sisco to Norfolk Tides. |
| 06/16/18 | Baltimore Orioles sent LHP D.J. Snelten outright to Norfolk Tides. |
| 06/15/18 | Baltimore Orioles designated LHP D.J. Snelten for assignment. |
| 06/15/18 | Baltimore Orioles recalled Tanner Scott from Norfolk Tides. |
| 06/15/18 | Baltimore Orioles sent 3B Tim Beckham on a rehab assignment to Bowie Baysox. |
| 06/15/18 | Baltimore Orioles optioned RHP Yefry Ramirez to Norfolk Tides. |
| 06/15/18 | Baltimore Orioles placed LHP Richard Bleier on the 10-day disabled list retroactive to June 14, 2018. Left shoulder latissimus strain. |
| 06/15/18 | Baltimore Orioles signed OF Doran Turchin. |
| 06/15/18 | Baltimore Orioles signed OF Robert Neustrom. |
| 06/15/18 | Baltimore Orioles selected the contract of Corban Joseph from Bowie Baysox. |
| 06/14/18 | Baltimore Orioles sent RHP Gabriel Ynoa on a rehab assignment to Bowie Baysox. |
| 06/13/18 | Baltimore Orioles recalled Yefry Ramirez from Norfolk Tides. |
| 06/13/18 | Baltimore Orioles optioned LHP Donnie Hart to Norfolk Tides. |
| 06/12/18 | Baltimore Orioles signed RHP Grayson Rodriguez. |
| 06/12/18 | Baltimore Orioles recalled Donnie Hart from Norfolk Tides. |
| 06/12/18 | Baltimore Orioles placed RHP Andrew Cashner on the 10-day disabled list retroactive to June 9, 2018. Lower back strain. |
| 06/12/18 | Baltimore Orioles signed SS Zachary McLeod. |
| 06/11/18 | Baltimore Orioles placed RHP Pedro Araujo on the 10-day disabled list. Right elbow sprain. |
| 06/11/18 | Baltimore Orioles transferred RF Colby Rasmus from the 10-day disabled list to the 60-day disabled list. Left hip flexor strain. |
| 06/11/18 | Zach Britton roster status changed by Baltimore Orioles. |
| 06/09/18 | Baltimore Orioles optioned LHP Tanner Scott to Norfolk Tides. |
| 06/09/18 | Baltimore Orioles activated RHP Darren O'Day from the 10-day disabled list. |
| 06/07/18 | Baltimore Orioles signed free agent LHP Antonio Pujols to a minor league contract. |
| 06/06/18 | Baltimore Orioles signed free agent RHP Jose Martinez to a minor league contract. |
| 06/05/18 | Baltimore Orioles sent OF Colby Rasmus on a rehab assignment to Frederick Keys. |
| 06/05/18 | Baltimore Orioles sent RHP Darren O'Day on a rehab assignment to Frederick Keys. |
| 06/05/18 | Baltimore Orioles sent LHP Zach Britton on a rehab assignment to Norfolk Tides. |
| 06/05/18 | Baltimore Orioles recalled Austin Wynns from Norfolk Tides. |
| 06/04/18 | Baltimore Orioles optioned LHP D.J. Snelten to Norfolk Tides. |
| 06/04/18 | Baltimore Orioles claimed LHP D.J. Snelten off waivers from San Francisco Giants. |
| 06/02/18 | Baltimore Orioles signed free agent 1B Josue Herrera to a minor league contract. |
| 06/02/18 | Baltimore Orioles optioned C Andrew Susac to Norfolk Tides. |
| 06/02/18 | Baltimore Orioles signed free agent RHP Juan Herrera to a minor league contract. |
| 06/01/18 | Baltimore Orioles signed free agent OF Edwin Ventura to a minor league contract. |
| 06/01/18 | Baltimore Orioles signed free agent 1B Luis Santana to a minor league contract. |
| 06/01/18 | Baltimore Orioles activated 3B Danny Valencia from the paternity list. |
| 06/01/18 | Baltimore Orioles sent LHP Zach Britton on a rehab assignment to Bowie Baysox. |
| 06/01/18 | Baltimore Orioles sent RF Colby Rasmus on a rehab assignment to Bowie Baysox. |
| 06/01/18 | Baltimore Orioles optioned LHP Donnie Hart to Norfolk Tides. |