Ron Perranoski vs. Mark Prior — Career Comparison

Mark Prior built a career as a starting pitcher and Ron Perranoski 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 78), skill-based run prevention (DICE+ 137 vs 99), and run prevention (ERA+ 133 vs 111). Ron Perranoski held the edge in home run suppression (HR9+ 135 vs 112). Role difference aside, Mark Prior holds a clear edge on every meaningful shared measure.