Roberto Osuna vs. Mark Prior — Career Comparison

Mark Prior built a career as a starting pitcher and Roberto Osuna as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Roberto Osuna led in walk avoidance (BB%+ 220 vs 110), home run suppression (HR9+ 218 vs 112), and skill-based run prevention (DICE+ 164 vs 137). Mark Prior held the edge in strikeout rate (K%+ 170 vs 121). Role difference aside, Roberto Osuna holds a clear edge on every meaningful shared measure.