Castro (shoulder) pitched a perfect inning for Double-A Somerset on Sunday.
Castro has been dealing with a right shoulder strain since mid-July, and this was his first outing after over two months on the shelf. The righty reliever pitched a perfect sixth inning in a game that also featured fellow rehabbing relievers Aroldis Chapman (leg) and Zack Britton (elbow). Castro will likely need at least a week to ramp up before potentially rejoining the big club.