Morneau, meanwhile, has been out since mid-May with a cervical strain and concussion symptoms, but Rockies manager Walt Weiss said the move was solely roster-related.
"Just needed to create a spot, so his condition hasn't changed," Weiss said. "It's pretty much the same -- good days and bad days. We feel like he is improving when we look at the big picture, so the move wasn't made because his condition is deteriorating."
• Former first-round pick David Dahl went 1-for-3 with an RBI in his first rehab game with Class A short season Boise on Monday. Dahl is recovering from a late-May outfield collision that forced the removal of his spleen.
• Outfielder Corey Dickerson -- in the midst of his second DL stint this season because of plantar fasciitis -- has been working on change-of-direction activities, such as sprints and agilities. Dickerson, however, hasn't been able to do any of those drills in baseball cleats, but he hopes that changes soon.
Dargan Southard is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.