The Pirates reinstated Holderman (wrist) from the 15-day injured list Sunday.
With the active roster expanding from 26 to 28 men Sunday, the Pirates will bring aboard two relievers in Holderman and Ryan Borucki (wrist), both of whom were activated from the IL. Holderman had been on the shelf since Aug. 8 with a sprained wrist but looks to be good to go after tossing an inning for Triple-A Indianapolis in each of his five rehab appearances.