Some of it has been difficult pitching matchups, such as the 0-for-4 exhibition with two strikeouts against Nationals standout Jordan Zimmermann on Thursday night. To regain his groove, Colvin showed up at Nationals Park early on Friday to take live swings against rehabbing right-handed closer Rafael Betancourt.
With Betancourt close to recovered from his right groin injury, Colvin was able to face a well-spotted fastball and a nasty slider.
"It's always good to see live stuff like that," said Colvin, whose average has dropped to .189 with three home runs and nine RBIs through 11 games. "It helps to go out there and get timing off a pitcher who is using a leg kick, instead of just taking batting practice.
"I've faced some tough guys and haven't done too well. When you face tough guys, you can't get behind on them."
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.