Jeff Pfeffer vs. Mark Prior — Career Comparison

On the career pitching numbers, Jeff Pfeffer posted a stronger line than Mark Prior. Jeff Pfeffer posted stronger numbers in ERA (2.77 vs 3.51) and home runs allowed (0.25 per nine innings vs 1.05). By the career numbers, Jeff Pfeffer 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.