Jason Kershner vs. John Mackinson — Career Comparison

On the career pitching numbers, Jason Kershner posted a stronger line than John Mackinson. Jason Kershner posted stronger numbers in ERA (4.22 vs 7.36) and WHIP (1.326 vs 1.773). By the career numbers, Jason Kershner 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.