Ed Klepfer vs. Art Mahaffey — Career Comparison

On the career pitching numbers, Ed Klepfer posted a stronger line than Art Mahaffey. Ed Klepfer posted stronger numbers in ERA (2.81 vs 4.17) and home runs allowed (0.06 per nine innings vs 1.13). By the career numbers, Ed Klepfer 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.