O'Grady was removed from the 40-man roster in order to make room for some of the younger prospects in the club's system. The left-hander missed a majority of the 2018 season after suffering a left shoulder sprain in April.

O'Grady has been on the disabled list with a left shoulder sprain since mid-April, so the move doesn't significantly affect his recovery timetable. It's unclear where exactly the 28-year-old is at in the recovery process, and he will likely require a lengthy minor-league rehab assignment after sitting out the last two months.

O'Grady will be eligible to return from the DL next Friday prior to the Marlins' series against Colorado. The southpaw appeared to have suffered the injury during his outing versus the Yankees on Tuesday, though the club has failed to describe a timetable for him at this point. In a corresponding move, Miami recalled Merandy Gonzalez from Double-A Jacksonville.

O'Grady was initially vying for one of the team's final rotation spots, but manager Don Mattingly noted the team would prefer to have the 27-year-old in a more versatile bullpen role. "I think we're looking at [O'Grady] more from a reliever standpoint, but as a reliever who can do multiple things," Mattingly said. With the Marlins' top lefty reliever from 2017, Jarlin Garcia, auditioning for a starting role, O'Grady could slide in as the team's top left-handed bullpen arm while also offering the flexibility to pitch multiple innings. O'Grady held lefty hitters to a .167 average last season, though he's not viewed strictly as a specialist.