Matthew Liberatore vs. Art Mahaffey — Career Comparison

Looking at the career totals, Matthew Liberatore and Art Mahaffey are fairly close on the surface numbers. Art Mahaffey had the edge in ERA (4.17 vs 4.63). 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.