Ken MacKenzie vs. Jim Peterson — Career Comparison

Looking at the career totals, Ken MacKenzie and Jim Peterson are fairly close on the surface numbers. Ken MacKenzie posted stronger numbers in ERA (4.8 vs 5.27) and WHIP (1.450 vs 1.665). Jim Peterson had the advantage in home runs allowed (0.74 per nine innings vs 1.43). By the career numbers, Ken MacKenzie 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.