Cody Allen vs. Michael Kopech — Career Comparison

Michael Kopech built a career as a starting pitcher and Cody Allen as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Cody Allen led in run prevention (ERA+ 144 vs 95), skill-based run prevention (DICE+ 119 vs 78), and walk avoidance (BB%+ 95 vs 58). Role difference aside, Cody Allen holds a clear edge on every meaningful shared measure.