Jack Armstrong vs. John Halama — Career Comparison

The numbers give John Halama a clear advantage over Jack Armstrong across the core pitching metrics. John Halama led in walk avoidance (BB%+ 129 vs 91), run prevention (ERA+ 105 vs 89), and home run suppression (HR9+ 97 vs 85). Jack Armstrong held the edge in strikeout rate (K%+ 103 vs 76). John Halama was the better starter — the numbers make that case clearly.