Jonathan Aro vs. Hector Perez — Career Comparison

On the career pitching numbers, Jonathan Aro posted a stronger line than Hector Perez. Jonathan Aro posted stronger numbers in ERA (6.55 vs 13.5) and WHIP (1.909 vs 5.000). By the career numbers, Jonathan Aro 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.