Rocky Biddle vs. Lefty Hopper — Career Comparison

Looking at the career totals, Rocky Biddle and Lefty Hopper are fairly close on the surface numbers. Lefty Hopper posted stronger numbers in ERA (4.91 vs 5.47) and home runs allowed (0 per nine innings vs 1.4). Rocky Biddle had the advantage in WHIP (1.569 vs 1.727). By the career numbers, Lefty Hopper 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.