Jose Acosta vs. Michael Petersen — Career Comparison

On the career pitching numbers, Jose Acosta posted a stronger line than Michael Petersen. Jose Acosta posted stronger numbers in ERA (4.51 vs 5.02) and home runs allowed (0.38 per nine innings vs 1.43). By the career numbers, Jose Acosta had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.