Jack Leiter vs. Jordan Zimmermann — Career Comparison

On the career pitching numbers, Jordan Zimmermann posted a stronger line than Jack Leiter. Jordan Zimmermann posted stronger numbers in ERA (4.07 vs 4.8) and WHIP (1.258 vs 1.361). By the career numbers, Jordan Zimmermann 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.