Joe Lotz vs. Art Mahaffey — Career Comparison

Looking at the career totals, Joe Lotz and Art Mahaffey are fairly close on the surface numbers. Joe Lotz posted stronger numbers in WHIP (1.200 vs 1.351) and home runs allowed (0.23 per nine innings vs 1.13). Art Mahaffey had the advantage in ERA (4.17 vs 4.28). By the career numbers, Joe Lotz 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.