Casey Fien vs. Michael Kopech — Career Comparison

Michael Kopech built a career as a starting pitcher and Casey Fien as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Casey Fien led in walk avoidance (BB%+ 193 vs 58), skill-based run prevention (DICE+ 105 vs 78), and run prevention (ERA+ 111 vs 95). Michael Kopech held the edge in strikeout rate (K%+ 100 vs 100). Role difference aside, Casey Fien holds a clear edge on every meaningful shared measure.