Bill Hoffer vs. Michael Petersen — Career Comparison

On the career pitching numbers, Bill Hoffer posted a stronger line than Michael Petersen. Bill Hoffer posted stronger numbers in ERA (3.75 vs 5.02) and WHIP (1.424 vs 1.593). By the career numbers, Bill Hoffer 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.