Michael Kopech vs. Bill Stemmyer — Career Comparison

Michael Kopech built a career as a starting pitcher and Bill Stemmyer as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Bill Stemmyer posted stronger surface numbers — ERA 3.67 and WHIP 1.388 compared to 4.14 and 1.333 for Michael Kopech. By the career numbers, Bill Stemmyer had the better of this cross-role comparison — though era context would sharpen the verdict.