A. J. Achter vs. Jonathan Aro — Career Comparison

Looking at the career totals, A. J. Achter and Jonathan Aro are fairly close on the surface numbers. A. J. Achter posted stronger numbers in ERA (3.92 vs 6.55) and WHIP (1.484 vs 1.909). Jonathan Aro had the advantage in home runs allowed (1.64 per nine innings vs 1.89). By the career numbers, A. J. Achter 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.