Tom Johnson vs. Jerry Koosman — Career Comparison

Jerry Koosman built a career as a starting pitcher and Tom Johnson as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Tom Johnson led in walk avoidance (BB%+ 144 vs 102), home run suppression (HR9+ 116 vs 95), and skill-based run prevention (DICE+ 115 vs 101). Jerry Koosman held the edge in strikeout rate (K%+ 109 vs 102). Role difference aside, Tom Johnson holds a clear edge on every meaningful shared measure.