The Royals recalled Marsh from Triple-A Omaha to start Sunday's game against the Astros.
The right-hander allowed four runs (two earned) over 4.2 innings during a spot start in a doubleheader Aug. 26 against the Guardians, and he'll re-enter the Royals rotation for Sunday's series finale in Houston. Marsh has a 4.67 ERA, 1.25 WHIP and 95:33 K:BB across 106 innings this season, and he could see additional starts beyond Sunday with Michael Lorenzen (hamstring) recently landing on the injured list.