Jeff Pfeffer vs. Andy Sonnanstine — Career Comparison

On the career pitching numbers, Jeff Pfeffer posted a stronger line than Andy Sonnanstine. Jeff Pfeffer posted stronger numbers in ERA (2.77 vs 5.26) and WHIP (1.210 vs 1.414). 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.