George Diehl vs. Michael Kopech — Career Comparison

Michael Kopech built a career as a starting pitcher and George Diehl as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. George Diehl posted stronger surface numbers — ERA 3.52 and WHIP 1.435 compared to 4.14 and 1.333 for Michael Kopech. By the career numbers, George Diehl had the better of this cross-role comparison — though era context would sharpen the verdict.