The Rockies placed Quantrill (tricep) on the 15-day injured list Sunday.
Quantrill had been in line to start Sunday's series finale with the Orioles at Coors Field, but he was scratched a day in advance after experiencing right triceps inflammation. According to Patrick Lyons of JustBaseball.com, Quantrill's injury isn't considered significant, with manager Bud Black noting that the right-hander is expected to return from the IL before the end of September. Ty Blach was called up from Triple-A Albuquerque to fill Quantrill's spot on the active roster and in the rotation.