Jeff Niemann vs. Mike Willis — Career Comparison

Jeff Niemann 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. Jeff Niemann led in home run suppression (HR9+ 99 vs 61), run prevention (ERA+ 105 vs 81), and skill-based run prevention (DICE+ 99 vs 84). Role difference aside, Jeff Niemann holds a clear edge on every meaningful shared measure.