Andy Pettitte vs. Mark Prior — Career Comparison

The numbers give Mark Prior a clear advantage over Andy Pettitte across the core pitching metrics. Mark Prior led in strikeout rate (K%+ 170 vs 99), skill-based run prevention (DICE+ 137 vs 108), and run prevention (ERA+ 133 vs 113). Andy Pettitte held the edge in home run suppression (HR9+ 126 vs 112). Mark Prior was the better starter — the numbers make that case clearly.