Ed Pierce vs. Nate Robertson — Career Comparison

Looking at the career totals, Ed Pierce and Nate Robertson are fairly close on the surface numbers. Nate Robertson posted stronger numbers in WHIP (1.493 vs 2.438) and home runs allowed (1.25 per nine innings vs 1.69). Ed Pierce had the advantage in ERA (3.38 vs 5.01). By the career numbers, Nate Robertson 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.