Zach McClellan made his Major League debut for the Colorado Rockies on April 16, 2007. He made 12 relief appearances in April and May, averaging just under a strikeout per inning in 14 innings pitched. He missed the rest of the season with a shoulder injury.

The spring, McClellan is battling for a bullpen job as a non-roster invitee to big league camp. Unfortunately, he injured his knee last week and may face more surgery.