Art Mahaffey vs. Zach Monroe — Career Comparison

Looking at the career totals, Art Mahaffey and Zach Monroe are fairly close on the surface numbers. Art Mahaffey posted stronger numbers in WHIP (1.351 vs 1.467) and home runs allowed (1.13 per nine innings vs 1.47). Zach Monroe had the advantage in ERA (3.38 vs 4.17). By the career numbers, Art 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.