Clarence Blethen vs. Diego Moreno — Career Comparison

Looking at the career totals, Clarence Blethen and Diego Moreno are fairly close on the surface numbers. Diego Moreno posted stronger numbers in ERA (5.06 vs 7.32) and WHIP (1.250 vs 2.186). Clarence Blethen had the advantage in home runs allowed (0 per nine innings vs 1.13). By the career numbers, Diego Moreno 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.