Dutch Leonard vs. Art Mahaffey — Career Comparison

On the career pitching numbers, Dutch Leonard posted a stronger line than Art Mahaffey. Dutch Leonard posted stronger numbers in ERA (3.25 vs 4.17) and WHIP (1.256 vs 1.351). By the career numbers, Dutch Leonard 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.