Jonathan Aro vs. Chuck Hartenstein — Career Comparison

On the career pitching numbers, Chuck Hartenstein posted a stronger line than Jonathan Aro. Chuck Hartenstein posted stronger numbers in ERA (4.52 vs 6.55) and WHIP (1.438 vs 1.909). By the career numbers, Chuck Hartenstein 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.