David Aardsma vs. John McCarty — Career Comparison

Looking at the career totals, David Aardsma and John McCarty are fairly close on the surface numbers. John McCarty posted stronger numbers in ERA (3.91 vs 4.27) and home runs allowed (0.3 per nine innings vs 1.09). David Aardsma had the advantage in WHIP (1.487 vs 1.738). By the career numbers, John McCarty 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.