Jim Peterson vs. George Zackert — Career Comparison

Looking at the career totals, Jim Peterson and George Zackert are fairly close on the surface numbers. Jim Peterson posted stronger numbers in ERA (5.27 vs 11.88) and WHIP (1.665 vs 3.120). George Zackert had the advantage in home runs allowed (0 per nine innings vs 0.74). By the career numbers, Jim Peterson 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.