Jonathan Aro vs. Grover Powell — Career Comparison

On the career pitching numbers, Grover Powell posted a stronger line than Jonathan Aro. Grover Powell posted stronger numbers in ERA (2.72 vs 6.55) and WHIP (1.389 vs 1.909). By the career numbers, Grover Powell 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.