Jonathan Aro vs. Jim Middleton — Career Comparison

On the career pitching numbers, Jim Middleton posted a stronger line than Jonathan Aro. Jim Middleton posted stronger numbers in ERA (4.51 vs 6.55) and WHIP (1.497 vs 1.909). By the career numbers, Jim Middleton 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.