Luis Arroyo vs. John Perkovich — Career Comparison

On the career pitching numbers, Luis Arroyo posted a stronger line than John Perkovich. Luis Arroyo posted stronger numbers in ERA (3.93 vs 7.2) and WHIP (1.440 vs 1.600). By the career numbers, Luis Arroyo 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.