Charlie Kerfeld vs. John Martin — Career Comparison

John Martin built a career as a starting pitcher and Charlie Kerfeld as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. John Martin posted stronger surface numbers — ERA 3.94 and WHIP 1.237 compared to 4.2 and 1.572 for Charlie Kerfeld. By the career numbers, John Martin had the better of this cross-role comparison — though era context would sharpen the verdict.