The Pirates acquired Bachar from the Marlins on Monday in exchange for Brandan Bidois, Hyun Seung Lee and Brian Sanchez.
Bachar has logged a 3.84 ERA and 61:21 K:BB over 58.2 frames out of the Marlins' bullpen this season. The 31-year-old reliever will offer the Pirates the ability to cover multiple innings, and he is under team control through 2030.