Former Colorado Rockies and Indiana University reliever Zach McClellan joined the RailCats before the start of the 2010 season.

McClellan, 30, made his major league debut on April 17, 2007 at Coors Field and would work out of the Colorado bullpen for the next month before his season was derailed by an injury.  McClellan did not allow a run in eight of his 12 major league outings and picked up his first big league win over the St. Louis Cardinals May 7.  McClellan struck out 13 in 14.0 innings that summer and issued only three un-intentional walks for a Rockies team that would go on to win the National League pennant.

McClellan injured his shoulder in mid-May 2007 and compounded that with a knee injury in Spring Training the next year.  The right-hander pitched in six games in 2008 and did not play in 2009.

A native of Toledo, Ohio, McClellan was selected by the Kansas City Royals in the fifth round of the 2000 Major League Entry Draft.  McClellan had a breakout 2003 campaign at High-A Wilmington, making 23 starts and posting an impressive 2.84 ERA.  That season, McClellan allowed only 101 hits in 133.0 innings (.212 average against) and enjoyed his first 100 strikeout year.

Early in the 2004 season, McClellan was traded to the Rockies and was a starter for the Tulsa Drillers (AA) in 2004 before converting to a relief role.  McClellan came out of the bullpen for Colorado Springs (AAA) the next three seasons and put up good numbers before his call-up in 2007.

In nine professional seasons, McClellan has amassed nearly over 750 innings and 35 wins, boasting a 4.05 ERA in 227 minor league outings.  McClellan has 110 starts under his belt and boasts an impressive strikeout-walk ratio, racking up 553 whiffs against only 244 walks.