Roger Erickson vs. Zach Jackson — Career Comparison

On the career pitching numbers, Roger Erickson posted a stronger line than Zach Jackson. Roger Erickson posted stronger numbers in ERA (4.13 vs 5.81) and WHIP (1.411 vs 1.566). By the career numbers, Roger Erickson 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.