David Purcey vs. Andy Sonnanstine — Career Comparison

Andy Sonnanstine built a career as a starting pitcher and David Purcey as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Andy Sonnanstine led in walk avoidance (BB%+ 172 vs 84), skill-based run prevention (DICE+ 109 vs 88), and run prevention (ERA+ 90 vs 72). Role difference aside, Andy Sonnanstine holds a clear edge on every meaningful shared measure.