David Hernandez vs. John Ryan — Career Comparison

Looking at the career totals, David Hernandez and John Ryan are fairly close on the surface numbers. John Ryan posted stronger numbers in ERA (3.35 vs 4.12) and home runs allowed (0.18 per nine innings vs 1.22). David Hernandez had the advantage in WHIP (1.335 vs 1.510). By the career numbers, John 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.