Joe Rosselli vs. Bruce Zimmermann — Career Comparison

Looking at the career totals, Joe Rosselli and Bruce Zimmermann are fairly close on the surface numbers. Bruce Zimmermann posted stronger numbers in ERA (5.64 vs 8.7) and WHIP (1.460 vs 2.033). Joe Rosselli had the advantage in home runs allowed (1.5 per nine innings vs 2.3). By the career numbers, Bruce Zimmermann 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.