Jeremy Affeldt vs. Dan Petry — Career Comparison

Dan Petry built a career as a starting pitcher and Jeremy Affeldt as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jeremy Affeldt led in home run suppression (HR9+ 118 vs 77), run prevention (ERA+ 98 vs 90), and skill-based run prevention (DICE+ 89 vs 82). Role difference aside, Jeremy Affeldt holds a clear edge on every meaningful shared measure.