David Hernandez vs. John Purdin — Career Comparison

Looking at the career totals, David Hernandez and John Purdin are fairly close on the surface numbers. David Hernandez posted stronger numbers in WHIP (1.335 vs 1.410) and home runs allowed (1.22 per nine innings vs 1.46). John Purdin had the advantage in ERA (3.9 vs 4.12). 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.