Carlos Marmol vs. Jim Peterson — Career Comparison

On the career pitching numbers, Carlos Marmol posted a stronger line than Jim Peterson. Carlos Marmol posted stronger numbers in ERA (3.57 vs 5.27) and WHIP (1.390 vs 1.665). By the career numbers, Carlos Marmol 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.