David Hernandez vs. Ryan O'Rourke — Career Comparison

Looking at the career totals, David Hernandez and Ryan O'Rourke are fairly close on the surface numbers. David Hernandez had the edge in ERA (4.12 vs 4.84). 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.