Roy Mahaffey vs. John Poloni — Career Comparison

Looking at the career totals, Roy Mahaffey and John Poloni are fairly close on the surface numbers. Roy Mahaffey posted stronger numbers in ERA (5.01 vs 6.43) and home runs allowed (0.72 per nine innings vs 1.29). John Poloni had the advantage in WHIP (1.286 vs 1.546). 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.