Frank Castillo vs. Frank Mulroney — Career Comparison

Frank Castillo built a career as a starting pitcher and Frank Mulroney as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Frank Mulroney posted stronger surface numbers — ERA 3 and WHIP 1.000 compared to 4.56 and 1.378 for Frank Castillo. By the career numbers, Frank Mulroney had the better of this cross-role comparison — though era context would sharpen the verdict.