The Rockies placed Herrera on the 15-day injured list Saturday due to left elbow inflammation.
Herrera pitched just one-third of an inning during his last appearance Friday versus the Giants and seems to have picked up an elbow injury in the process. He'll remain on the shelf until at least June 14, and his spot on the 26-man active roster will go to Ryan Feltner (elbow), who was reinstated from the IL to start Saturday's game against San Francisco.