David Hernandez vs. Francisco Perez — Career Comparison

Looking at the career totals, David Hernandez and Francisco Perez are fairly close on the surface numbers. David Hernandez posted stronger numbers in ERA (4.12 vs 5.91) and WHIP (1.335 vs 1.781). Francisco Perez had the advantage in home runs allowed (0.56 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.