Aaron Cook vs. Mike Willis — Career Comparison

Aaron Cook 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. Aaron Cook led in home run suppression (HR9+ 139 vs 61), run prevention (ERA+ 95 vs 81), and skill-based run prevention (DICE+ 96 vs 84). Mike Willis held the edge in strikeout rate (K%+ 87 vs 57). Role difference aside, Aaron Cook holds a clear edge on every meaningful shared measure.