Rocky Mountain Low

In their first nine seasons, the Rockies' home ERA was a lofty 6.07. But since '02, when they began using a humidor at Coors Field to make balls behave more like they do at sea level, Ubaldo Jimenez and the team's other pitchers have had that mark in free fall.

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5.47 2002

5.07 2003

6.27 2004

5.18 2005

4.72 2006

4.34 2007

4.83 2008

4.41 2009