Phil Klein vs. John Mackinson — Career Comparison

Looking at the career totals, Phil Klein and John Mackinson are fairly close on the surface numbers. Phil Klein posted stronger numbers in ERA (5.5 vs 7.36) and WHIP (1.653 vs 1.773). John Mackinson had the advantage in home runs allowed (1.23 per nine innings vs 1.46). By the career numbers, Phil Klein 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.