Jon Perlman vs. Mason Thompson — Career Comparison

On the career pitching numbers, Mason Thompson posted a stronger line than Jon Perlman. Mason Thompson posted stronger numbers in ERA (5.21 vs 6.35) and WHIP (1.667 vs 1.866). By the career numbers, Mason Thompson 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.