Jim Mann vs. W. Williams — Career Comparison

Looking at the career totals, Jim Mann and W. Williams are fairly close on the surface numbers. Jim Mann posted stronger numbers in ERA (4.83 vs 6.35) and WHIP (1.484 vs 1.765). W. Williams had the advantage in home runs allowed (0 per nine innings vs 1.42). By the career numbers, Jim Mann 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.