Less than a week after returning to action, Dickerson was sent back to the 15-day disabled list on Wednesday. The Rockies also called up reliever Justin Miller from Triple-A Albuquerque and sent right-hander Jordan Lyles to the 60-day DL, which made room for Miller on the 40-man roster.
"Corey is very frustrated," Rockies manager Walt Weiss said on Wednesday. "I think we all know the type of player and the type of person Corey is. This is the last thing he wants, but I think deep down, he's knows that this is what's best for him.