Frank Castillo vs. Leon Williams — Career Comparison

Frank Castillo built a career as a starting pitcher and Leon Williams as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Frank Castillo posted stronger surface numbers — ERA 4.56 and WHIP 1.378 compared to 5.4 and 2.160 for Leon Williams. By the career numbers, Frank Castillo had the better of this cross-role comparison — though era context would sharpen the verdict.