Zach Jackson vs. Spencer Schwellenbach — Career Comparison

On the career pitching numbers, Spencer Schwellenbach posted a stronger line than Zach Jackson. Spencer Schwellenbach posted stronger numbers in ERA (3.23 vs 5.81) and WHIP (1.016 vs 1.566). By the career numbers, Spencer Schwellenbach 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.