Miami Marlins’ A.J. Puk, initially designated as a starter, will return to the bullpen upon his recovery from a shoulder injury. Despite promising potential as a starter, Puk’s struggles with injuries and underwhelming rotation performance prompted the decision. The Marlins’ rotation has faced depletion due to trades and injuries, initially leading to Puk’s promotion. However, poor results and Puk’s injury have led to a shift in strategy, with the team seeking stability and depth in their pitching staff.