Bob Heffner vs. Mark Prior — Career Comparison

The numbers give Mark Prior a clear advantage over Bob Heffner across the core pitching metrics. Mark Prior led in strikeout rate (K%+ 170 vs 103), run prevention (ERA+ 133 vs 87), and skill-based run prevention (DICE+ 137 vs 100). Bob Heffner held the edge in walk avoidance (BB%+ 121 vs 110). Mark Prior was the better starter — the numbers make that case clearly.