John Perkovich vs. David Phelps — Career Comparison

On the career pitching numbers, David Phelps posted a stronger line than John Perkovich. David Phelps posted stronger numbers in ERA (3.8 vs 7.2) and WHIP (1.337 vs 1.600). By the career numbers, David Phelps 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.