Charlie Kerfeld vs. Francis Martes — Career Comparison

On the career pitching numbers, Charlie Kerfeld posted a stronger line than Francis Martes. Charlie Kerfeld posted stronger numbers in ERA (4.2 vs 5.8) and home runs allowed (0.54 per nine innings vs 1.16). 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.