Jim Peterson vs. Guillermo Zuñiga — Career Comparison

Looking at the career totals, Jim Peterson and Guillermo Zuñiga are fairly close on the surface numbers. Guillermo Zuñiga posted stronger numbers in ERA (5.03 vs 5.27) and WHIP (1.424 vs 1.665). Jim Peterson had the advantage in home runs allowed (0.74 per nine innings vs 2.29). By the career numbers, Guillermo Zuñiga 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.