Charlie Kerfeld vs. William Stein — Career Comparison

Looking at the career totals, Charlie Kerfeld and William Stein are fairly close on the surface numbers. Charlie Kerfeld posted stronger numbers in ERA (4.2 vs 9) and WHIP (1.572 vs 2.625). William Stein 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.