Charlie Kerfeld vs. Garrett Olson — Career Comparison

Garrett Olson 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 6.26 and 1.679 for Garrett Olson. By the career numbers, Charlie Kerfeld had the better of this cross-role comparison — though era context would sharpen the verdict.