Kirk Dressendorfer vs. Roy Mahaffey — Career Comparison

On the career pitching numbers, Roy Mahaffey posted a stronger line than Kirk Dressendorfer. Roy Mahaffey posted stronger numbers in ERA (5.01 vs 5.45) and home runs allowed (0.72 per nine innings vs 1.3). By the career numbers, Roy Mahaffey 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.