Mark Prior vs. Saul Rivera — Career Comparison

Mark Prior built a career as a starting pitcher and Saul Rivera as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Mark Prior led in strikeout rate (K%+ 170 vs 80), run prevention (ERA+ 133 vs 103), and skill-based run prevention (DICE+ 137 vs 108). Saul Rivera held the edge in home run suppression (HR9+ 383 vs 112). Role difference aside, Mark Prior holds a clear edge on every meaningful shared measure.