Castro walked one and struck out two over 1.1 scoreless innings to earn his first hold in Friday's 6-3 comeback win over the Dodgers.
Castro gave the Diamondbacks four outs before giving way to Andrew Chafin for the save. Castro has yet to allow a run or hit in three outings while walking two and fanning five over 3.2 innings. As manager Torey Lovullo navigates end-game roles, he'll continue to mix and match relievers. Both Castro and Chafin have earned high-leverage opportunities late in games.