Juan Marichal vs. John Poloni — Career Comparison

On the career pitching numbers, Juan Marichal posted a stronger line than John Poloni. Juan Marichal posted stronger numbers in ERA (2.89 vs 6.43) and WHIP (1.125 vs 1.286). By the career numbers, Juan Marichal 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.