Jonathan Aro vs. Bill Sweeney — Career Comparison

On the career pitching numbers, Bill Sweeney posted a stronger line than Jonathan Aro. Bill Sweeney posted stronger numbers in ERA (2.67 vs 6.55) and WHIP (1.153 vs 1.909). By the career numbers, Bill Sweeney 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.