David Hernandez vs. John Rocker — Career Comparison

The numbers give John Rocker a clear advantage over David Hernandez across the core pitching metrics. John Rocker led in home run suppression (HR9+ 151 vs 74), run prevention (ERA+ 159 vs 83), and strikeout rate (K%+ 160 vs 105). David Hernandez held the edge in walk avoidance (BB%+ 92 vs 72). John Rocker was the better reliever — the numbers make that case clearly.