Jhonathan Diaz vs. Art Doll — Career Comparison

Looking at the career totals, Jhonathan Diaz and Art Doll are fairly close on the surface numbers. Art Doll had the edge in ERA (3 vs 4.66). By the career numbers, Art Doll 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.