David Peterson vs. Mark Prior — Career Comparison

The numbers give Mark Prior a clear advantage over David Peterson across the core pitching metrics. Mark Prior led in strikeout rate (K%+ 170 vs 109), walk avoidance (BB%+ 110 vs 81), and skill-based run prevention (DICE+ 137 vs 112). David Peterson held the edge in home run suppression (HR9+ 157 vs 112). Mark Prior was the better starter — the numbers make that case clearly.