Porfi Altamirano vs. Brian O'Connor — Career Comparison

On the career pitching numbers, Porfi Altamirano posted a stronger line than Brian O'Connor. Porfi Altamirano posted stronger numbers in ERA (4.03 vs 5.11) and WHIP (1.342 vs 1.865). By the career numbers, Porfi Altamirano 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.