Marinez was placed on the 10-day DL on Friday due to a right hamstring strain.
Marinez suffered the injury while warming up for his second inning of relief during Thursday's game. Manager Buck Showalter admitted that Marinez isn't likely going to be ready as soon as he's eligible and that he will require a minor-league rehab stint before returning to Baltimore. In a subsequent move, Evan Phillips was called up from Triple-A Norfolk.