Clarence Blethen vs. Charlie Kerfeld — Career Comparison

Looking at the career totals, Clarence Blethen and Charlie Kerfeld are fairly close on the surface numbers. Charlie Kerfeld posted stronger numbers in ERA (4.2 vs 7.32) and WHIP (1.572 vs 2.186). Clarence Blethen had the advantage in home runs allowed (0 per nine innings vs 0.54). By the career numbers, Charlie Kerfeld 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.