Spencer Bivens vs. John Mackinson — Career Comparison

On the career pitching numbers, Spencer Bivens posted a stronger line than John Mackinson. Spencer Bivens posted stronger numbers in ERA (3.68 vs 7.36) and WHIP (1.296 vs 1.773). By the career numbers, Spencer Bivens 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.