Frank Castillo vs. Willie Mills — Career Comparison

Frank Castillo built a career as a starting pitcher and Willie Mills 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 8.44 and 1.563 for Willie Mills. By the career numbers, Frank Castillo had the better of this cross-role comparison — though era context would sharpen the verdict.