The Guardians recalled Castro from Triple-A Columbus on Thursday, Ryan Lewis of the Akron Beacon Journal reports.
Since Konnor Pilkington wasn't on track to maintain his spot in the rotation following his start in Wednesday's 7-5 win over the Rockies, the Guardians elected to swap him off the active roster in favor of a fresh relief arm for Thursday's series finale. Castro has made six appearances with Cleveland in 2022, logging a 4.05 ERA and 1.50 WHIP across 6.2 innings.