Ray Kerr vs. John Mackinson — Career Comparison

Looking at the career totals, Ray Kerr and John Mackinson are fairly close on the surface numbers. Ray Kerr posted stronger numbers in ERA (5.3 vs 7.36) and WHIP (1.436 vs 1.773). John Mackinson had the advantage in home runs allowed (1.23 per nine innings vs 1.66). By the career numbers, Ray Kerr 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.