Castro was traded to the Orioles on Friday in exchange for a player to be named later or cash.
Castro was the third piece the Rockies received in the deal that sent Troy Tulowitzki to Toronto at the trade deadline in 2015, but shoulder woes limited him to just 49.1 innings in the Rockies' system prior to him getting designated for assignment on April 2. If he can build up strength in his shoulder, the Orioles will look to salvage his electric arm, which once profiled nicely in a high-leverage role, but it's possible we won't see him back in game action anytime soon. Joe Gunkel was designated for assignment as a corresponding move.