Bill Irwin vs. Ethan Roberts — Career Comparison

Looking at the career totals, Bill Irwin and Ethan Roberts are fairly close on the surface numbers. Bill Irwin posted stronger numbers in WHIP (1.529 vs 1.592) and home runs allowed (1.06 per nine innings vs 1.87). Ethan Roberts had the advantage in ERA (4.98 vs 5.82). By the career numbers, Bill Irwin 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.