Bill Kelso vs. John Mackinson — Career Comparison

On the career pitching numbers, Bill Kelso posted a stronger line than John Mackinson. Bill Kelso posted stronger numbers in ERA (3.13 vs 7.36) and WHIP (1.393 vs 1.773). By the career numbers, Bill Kelso 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.