Paul Clemens vs. Al Mattern — Career Comparison

On the career pitching numbers, Al Mattern posted a stronger line than Paul Clemens. Al Mattern posted stronger numbers in ERA (3.37 vs 4.89) and WHIP (1.394 vs 1.500). By the career numbers, Al Mattern 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.