David Hernandez vs. Jack O'Loughlin — Career Comparison

Looking at the career totals, David Hernandez and Jack O'Loughlin are fairly close on the surface numbers. David Hernandez posted stronger numbers in ERA (4.12 vs 4.66) and WHIP (1.335 vs 1.862). Jack O'Loughlin had the advantage in home runs allowed (0.93 per nine innings vs 1.22). By the career numbers, David Hernandez 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.