Garrett will start the second half of Saturday's doubleheader against the Guardians, Jordan McPherson of the Miami Herald reports.
Garrett was supposed to toe the rubber for the Marlins in Friday's series opener, but that game got postponed a day because of inclement weather in Cleveland. The 25-year-old holds a 3.38 ERA, 1.58 WHIP and 13:2 K:BB through 13.1 innings (two starts, one relief appearance) this season.