Gilbreath was recalled by the Rockies on Saturday.
Gilbreath served as the extra man for a doubleheader in mid-April but didn't get to make his MLB debut. He's up in place of Antonio Senzatela (groin) this time around, though he's unlikely to take Senzatela's place in the rotation, which isn't set to come up until Tuesday. Gilbreath was almost exclusively a starter in the minors, but he's yet to pitch above High-A and struggled to a 5.81 ERA at that level in 28 starts in 2019.