"He may be down for a few days," manager Walt Weiss said of Arenado. "His thumb is real tender. It blew up pretty good last night."
Finger, thumb and hand injuries have been a problem for the Rockies all season. Outfielder Carlos Gonzalez could opt for season-ending surgery to repair his right middle finger. Pitcher Jorge De La Rosa had his latest start pushed back -- he hopes to Saturday -- because of a left thumb bruise. Righty Tyler Chatwood was removed from a start after he was hit on the right thumb by a batted ball. Earlier this season, center fielder Dexter Fowler suffered a right index finger injury, and compensating for that led to a right wrist injury that pushed him to the disabled list.
"The number of hand injuries … I've never seen this many in one season," Weiss said.
Fowler pinch-hit in Tuesday's 11-4 loss and lined out in his only at-bat.
Thomas Harding is a reporter for MLB.com. Read his blog, Hardball in the Rockies, and follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.