Willie Hernandez vs. Dan Petry — Career Comparison

Dan Petry built a career as a starting pitcher and Willie Hernandez as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Willie Hernandez led in strikeout rate (K%+ 109 vs 80), run prevention (ERA+ 100 vs 90), and skill-based run prevention (DICE+ 91 vs 82). Dan Petry held the edge in home run suppression (HR9+ 77 vs 76). Role difference aside, Willie Hernandez holds a clear edge on every meaningful shared measure.