John Perkovich vs. Steve Roser — Career Comparison

On the career pitching numbers, Steve Roser posted a stronger line than John Perkovich. Steve Roser posted stronger numbers in ERA (4.04 vs 7.2) and WHIP (1.413 vs 1.600). By the career numbers, Steve Roser 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.