Bill Stemmyer vs. Mike Willis — Career Comparison

On the career pitching numbers, Bill Stemmyer posted a stronger line than Mike Willis. Bill Stemmyer posted stronger numbers in ERA (3.67 vs 4.59) and WHIP (1.388 vs 1.524). By the career numbers, Bill Stemmyer 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.