Charlie Kerfeld vs. Danny Leon — Career Comparison

On the career pitching numbers, Charlie Kerfeld posted a stronger line than Danny Leon. Charlie Kerfeld posted stronger numbers in ERA (4.2 vs 5.89) and home runs allowed (0.54 per nine innings vs 2.45). 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.