Jake Arrieta vs. Bill Campbell — Career Comparison

Jake Arrieta built a career as a starting pitcher and Bill Campbell as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Bill Campbell led in home run suppression (HR9+ 142 vs 95), walk avoidance (BB%+ 100 vs 89), and run prevention (ERA+ 98 vs 87). Role difference aside, Bill Campbell holds a clear edge on every meaningful shared measure.