John Poloni vs. Rodrigo Rosario — Career Comparison

On the career pitching numbers, Rodrigo Rosario posted a stronger line than John Poloni. Rodrigo Rosario posted stronger numbers in ERA (1.13 vs 6.43) and WHIP (1.125 vs 1.286). By the career numbers, Rodrigo Rosario 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.