Billy Pierce vs. Mark Prior — Career Comparison

The numbers give Mark Prior a clear advantage over Billy Pierce across the core pitching metrics. Mark Prior led in strikeout rate (K%+ 170 vs 102), skill-based run prevention (DICE+ 137 vs 97), and run prevention (ERA+ 133 vs 109). Billy Pierce held the edge in walk avoidance (BB%+ 113 vs 110). Mark Prior was the better starter — the numbers make that case clearly.