Roy Mahaffey vs. Tommy Thompson — Career Comparison

Looking at the career totals, Roy Mahaffey and Tommy Thompson are fairly close on the surface numbers. Roy Mahaffey posted stronger numbers in ERA (5.01 vs 6.06) and WHIP (1.546 vs 1.714). Tommy Thompson had the advantage in home runs allowed (0 per nine innings vs 0.72). 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.