Len Barker vs. Bobby Castillo — Career Comparison

Len Barker built a career as a starting pitcher and Bobby Castillo as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Len Barker led in home run suppression (HR9+ 144 vs 85), strikeout rate (K%+ 141 vs 106), and skill-based run prevention (DICE+ 118 vs 91). Role difference aside, Len Barker holds a clear edge on every meaningful shared measure.