Jim Peterson vs. Dwight Siebler — Career Comparison

Looking at the career totals, Jim Peterson and Dwight Siebler are fairly close on the surface numbers. Dwight Siebler posted stronger numbers in ERA (3.45 vs 5.27) and WHIP (1.227 vs 1.665). Jim Peterson had the advantage in home runs allowed (0.74 per nine innings vs 1.15). By the career numbers, Dwight Siebler 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.