Diego Castillo vs. Cal Quantrill — Career Comparison

Cal Quantrill built a career as a starting pitcher and Diego Castillo as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Diego Castillo led in strikeout rate (K%+ 119 vs 82), run prevention (ERA+ 131 vs 101), and skill-based run prevention (DICE+ 116 vs 93). Role difference aside, Diego Castillo holds a clear edge on every meaningful shared measure.