Jason Grilli vs. Bob Heffner — Career Comparison

Bob Heffner built a career as a starting pitcher and Jason Grilli as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Bob Heffner led in walk avoidance (BB%+ 121 vs 89), skill-based run prevention (DICE+ 100 vs 85), and home run suppression (HR9+ 85 vs 81). Role difference aside, Bob Heffner holds a clear edge on every meaningful shared measure.