Rocky Biddle vs. Bill Hopper — Career Comparison

On the career pitching numbers, Bill Hopper posted a stronger line than Rocky Biddle. Bill Hopper posted stronger numbers in ERA (4.18 vs 5.47) and home runs allowed (0.3 per nine innings vs 1.4). By the career numbers, Bill 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.