Aaron Cook: 69 wins
The Colorado Rockies’ all-time wins leader is the organization’s longest tenured pitcher, Aaron Cook. Cook made his debut with the Rockies in 2002 and remains with the team today. He made more than 30 starts for the first time in 2006 and became a National League All-Star in 2008 with a 16-9 record on a 3.96 ERA in 211.1 innings. The veteran sinkerballer has been one of the best in baseball at inducing groundouts, enjoying a career rate of 1.41 groundouts-to-flyouts.
Jason Jennings: 58 wins
2002 Rookie of the Year Jason Jennings ranks second among the Colorado Rockies’ all-time wins leaders. Jennings had one of his best years in his first year, winning 16 games with a 4.52 ERA for the Rockies. He followed it with seasons of 12 and 11 wins in 2003 and 2004 respectively. His best overall season came in 2006 when he posted a 3.78 ERA and 142 strikeouts in 212 innings, but lack of offense and bullpen support limited him to only nine wins.
Jeff Francis: 55 wins
A current member of Colorado’s starting rotation, Jeff Francis ranks third among the Rockies’ all-time wins leaders. After making his Major League debut in 2004, Francis posted double-digit wins in each of his first three full seasons. In 2007, he won a career high 17 games with a 4.22 ERA and 165 strikeouts for the Rockies team that reached the World Series. His 2008 and 2009 seasons were ruined by a shoulder injury, but he returned in 2010 with a solid rebound year.
Pedro Astacio: 53 wins
Despite some mile-high ERA numbers, Pedro Astacio ranks fourth among the Colorado Rockies’ all-time wins leaders. Astacio pitched 15 Major League seasons for eight franchises with one of his longest stints coming in Colorado. Astacio posted great strikeout numbers during his tenure, totaling 749 in 827.1 innings as the Rockies’ all-time strikeouts leader. He was one of Colorado’s best pitchers from 1998 to 2000, posting a 42-34 record and a road ERA of 4.11.
Ubaldo Jimenez: 50 wins
Colorado’s current ace Ubaldo Jimenez has climbed to fifth on the list of Rockies’ all-time wins leaders. After a strong 2007 postseason in which he allowed only four runs in 16 innings, Jimenez emerged as a top pitcher for the Rockies in 2008. The power pitcher won 12 games with a 3.99 ERA and 172 strikeouts in his first full season. Jimenez continued to improve in 2009 and he became a first-time All-Star in 2010 after throwing the first no-hitter in team history. Through 682.2 innings, he has a 2.02 strikeout-to-walk ratio and a .593 winning percentage.