George Pierce vs. Mark Prior — Career Comparison

Looking at the career totals, George Pierce and Mark Prior are fairly close on the surface numbers. George Pierce posted stronger numbers in ERA (3.11 vs 3.51) and home runs allowed (0.14 per nine innings vs 1.05). Mark Prior had the advantage in WHIP (1.240 vs 1.299). By the career numbers, George Pierce 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.