Nate Robertson vs. Mike Willis — Career Comparison

Nate Robertson built a career as a starting pitcher and Mike Willis as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Nate Robertson led in home run suppression (HR9+ 88 vs 61), run prevention (ERA+ 91 vs 81), and skill-based run prevention (DICE+ 92 vs 84). Mike Willis held the edge in walk avoidance (BB%+ 100 vs 96). Role difference aside, Nate Robertson holds a clear edge on every meaningful shared measure.