Keith Atherton vs. John Mackinson — Career Comparison

On the career pitching numbers, Keith Atherton posted a stronger line than John Mackinson. Keith Atherton posted stronger numbers in ERA (3.99 vs 7.36) and WHIP (1.407 vs 1.773). By the career numbers, Keith Atherton 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.