John Perkovich vs. Adonis Rosa — Career Comparison

On the career pitching numbers, Adonis Rosa posted a stronger line than John Perkovich. Adonis Rosa posted stronger numbers in ERA (4.5 vs 7.2) and WHIP (0.500 vs 1.600). By the career numbers, Adonis Rosa 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.