Rudy Hernandez vs. Billy Koch — Career Comparison

Looking at the career totals, Rudy Hernandez and Billy Koch are fairly close on the surface numbers. Billy Koch posted stronger numbers in ERA (3.89 vs 4.12) and WHIP (1.466 vs 1.580). Rudy Hernandez had the advantage in home runs allowed (0.41 per nine innings vs 0.91). By the career numbers, Billy Koch 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.