Clem Llewellyn vs. Erik Swanson — Career Comparison

On the career pitching numbers, Clem Llewellyn posted a stronger line than Erik Swanson. Clem Llewellyn posted stronger numbers in ERA (0 vs 4.2) and WHIP (1.000 vs 1.154). By the career numbers, Clem Llewellyn 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.