The Baltimore Orioles have reinstated Ryan Mountcastle from the 60-day injured list and the veteran is in the starting lineup as the designated hitter on Friday against the Athletics.
The Orioles also placed a pair of outfielders on the IL. Tyler O'Neill, suffering from right wrist inflammation, will undergo his third stint off the field this season (retroactive to Aug. 6). Colton Cowser, who missed all of April and May with a broken left thumb, was placed on the seven-day concussion IL.
Both injuries occurred in collisions with outfield fences in Baltimore's most recent series in Philadelphia. O'Neill suffered his injury on Tuesday, as he ran into the right field fence on a home run by Max Kepler and came out of the game after taking another at-bat.
Cowser crashed into the left field f