Roy Mahaffey vs. Jose Mercedes — Career Comparison

Looking at the career totals, Roy Mahaffey and Jose Mercedes are fairly close on the surface numbers. Jose Mercedes posted stronger numbers in ERA (4.75 vs 5.01) and WHIP (1.455 vs 1.546). Roy Mahaffey had the advantage in home runs allowed (0.72 per nine innings vs 1.16). By the career numbers, Jose Mercedes 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.