Luther Hackman vs. Jerry Koosman — Career Comparison

Jerry Koosman built a career as a starting pitcher and Luther Hackman as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jerry Koosman led in strikeout rate (K%+ 109 vs 76), run prevention (ERA+ 110 vs 91), and skill-based run prevention (DICE+ 101 vs 86). Luther Hackman held the edge in home run suppression (HR9+ 101 vs 95). Role difference aside, Jerry Koosman holds a clear edge on every meaningful shared measure.