Joe Boyle vs. Bill Dietrich — Career Comparison

Looking at the career totals, Joe Boyle and Bill Dietrich are fairly close on the surface numbers. Bill Dietrich posted stronger numbers in ERA (4.48 vs 4.98) and home runs allowed (0.57 per nine innings vs 0.86). Joe Boyle had the advantage in WHIP (1.444 vs 1.501). By the career numbers, Bill Dietrich 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.