John Perkovich vs. Jack Robinson — Career Comparison

On the career pitching numbers, Jack Robinson posted a stronger line than John Perkovich. Jack Robinson posted stronger numbers in ERA (2.25 vs 7.2) and WHIP (1.250 vs 1.600). By the career numbers, Jack Robinson 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.