Luis Castillo vs. Melvin Mercedes — Career Comparison

Luis Castillo built a career as a starting pitcher and Melvin Mercedes as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Melvin Mercedes posted stronger surface numbers — ERA 0 and WHIP 0.000 compared to 5.06 and 1.969 for Luis Castillo. By the career numbers, Melvin Mercedes had the better of this cross-role comparison — though era context would sharpen the verdict.