John Perkovich vs. Al Raffo — Career Comparison

On the career pitching numbers, Al Raffo posted a stronger line than John Perkovich. Al Raffo posted stronger numbers in ERA (4.11 vs 7.2) and WHIP (1.507 vs 1.600). By the career numbers, Al Raffo 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.