The Twins optioned Castillo to Triple-A St. Paul on Tuesday.

EDGE Analysis

Castillo allowed just two runs over seven relief innings during his brief time with the Twins, but that came with a 3:7 K:BB. The veteran reliever will head back to Triple-A to clear room on the active roster for right-hander Louie Varland, who was called up from St. Paul to make a spot start Tuesday against the Rockies.