Charlie Kerfeld vs. Andy O'Connor — Career Comparison

Andy O'Connor 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. Charlie Kerfeld posted stronger surface numbers — ERA 4.2 and WHIP 1.572 compared to 10.13 and 2.750 for Andy O'Connor. By the career numbers, Charlie Kerfeld had the better of this cross-role comparison — though era context would sharpen the verdict.