Adam Peterson vs. Jeff Peterek — Career Comparison

On the career pitching numbers, Jeff Peterek posted a stronger line than Adam Peterson. Jeff Peterek posted stronger numbers in ERA (4.02 vs 5.46) and home runs allowed (0.86 per nine innings vs 1.39). By the career numbers, Jeff Peterek 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.