Jonathan Aro vs. John Schappert — Career Comparison

On the career pitching numbers, John Schappert posted a stronger line than Jonathan Aro. John Schappert posted stronger numbers in ERA (3.52 vs 6.55) and WHIP (1.273 vs 1.909). By the career numbers, John Schappert 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.