John Perkovich vs. Mel Rojas — Career Comparison

On the career pitching numbers, Mel Rojas posted a stronger line than John Perkovich. Mel Rojas posted stronger numbers in ERA (3.82 vs 7.2) and WHIP (1.313 vs 1.600). By the career numbers, Mel Rojas 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.