Frank Mack vs. B. J. Ryan — Career Comparison

Looking at the career totals, Frank Mack and B. J. Ryan are fairly close on the surface numbers. B. J. Ryan posted stronger numbers in ERA (3.37 vs 4.94) and WHIP (1.332 vs 1.732). Frank Mack had the advantage in home runs allowed (0.38 per nine innings vs 0.7). By the career numbers, B. J. Ryan 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.