Lou Mahaffey vs. John Michaelson — Career Comparison

On the career pitching numbers, Lou Mahaffey posted a stronger line than John Michaelson. Lou Mahaffey posted stronger numbers in ERA (3 vs 10.13) and WHIP (1.667 vs 1.875). By the career numbers, Lou Mahaffey 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.