James McDonald vs. Billy Wagner — Career Comparison

James McDonald built a career as a starting pitcher and Billy Wagner as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Billy Wagner led in run prevention (ERA+ 183 vs 94), strikeout rate (K%+ 162 vs 107), and skill-based run prevention (DICE+ 142 vs 89). Role difference aside, Billy Wagner holds a clear edge on every meaningful shared measure.