Michael Kopech vs. Ron Willis — Career Comparison

Michael Kopech built a career as a starting pitcher and Ron Willis as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Ron Willis led in home run suppression (HR9+ 134 vs 83), walk avoidance (BB%+ 80 vs 58), and skill-based run prevention (DICE+ 90 vs 78). Michael Kopech held the edge in strikeout rate (K%+ 100 vs 78). Role difference aside, Ron Willis holds a clear edge on every meaningful shared measure.