John Mackinson vs. Ken Polivka — Career Comparison

Looking at the career totals, John Mackinson and Ken Polivka are fairly close on the surface numbers. Ken Polivka posted stronger numbers in ERA (3 vs 7.36) and home runs allowed (0 per nine innings vs 1.23). John Mackinson had the advantage in WHIP (1.773 vs 2.000). By the career numbers, Ken Polivka 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.