Michael Kopech vs. Jim Weaver — Career Comparison

Michael Kopech built a career as a starting pitcher and Jim Weaver as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jim Weaver posted stronger surface numbers — ERA 2.55 and WHIP 1.340 compared to 4.14 and 1.333 for Michael Kopech. By the career numbers, Jim Weaver had the better of this cross-role comparison — though era context would sharpen the verdict.