Bert Blyleven vs. Bobby Castillo — Career Comparison

Bert Blyleven 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. Bert Blyleven led in walk avoidance (BB%+ 143 vs 85), run prevention (ERA+ 97 vs 88), and skill-based run prevention (DICE+ 98 vs 91). Bobby Castillo held the edge in home run suppression (HR9+ 85 vs 78). Role difference aside, Bert Blyleven holds a clear edge on every meaningful shared measure.