Les Bartholomew vs. John Mackinson — Career Comparison

On the career pitching numbers, Les Bartholomew posted a stronger line than John Mackinson. Les Bartholomew posted stronger numbers in ERA (6.75 vs 7.36) and home runs allowed (0.64 per nine innings vs 1.23). By the career numbers, Les Bartholomew 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.