Zach Jackson vs. Dutch Leonard — Career Comparison

On the career pitching numbers, Dutch Leonard posted a stronger line than Zach Jackson. Dutch Leonard posted stronger numbers in ERA (2.76 vs 5.81) and WHIP (1.225 vs 1.566). By the career numbers, Dutch Leonard 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.