Rogelio Armenteros vs. Art Mahaffey — Career Comparison

On the career pitching numbers, Rogelio Armenteros posted a stronger line than Art Mahaffey. Rogelio Armenteros posted stronger numbers in ERA (4 vs 4.17) and WHIP (1.222 vs 1.351). By the career numbers, Rogelio Armenteros 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.