Jose Castillo vs. Mike Walker — Career Comparison

Mike Walker built a career as a starting pitcher and Jose Castillo as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Jose Castillo posted stronger surface numbers — ERA 4.11 and WHIP 1.355 compared to 7.36 and 2.250 for Mike Walker. By the career numbers, Jose Castillo had the better of this cross-role comparison — though era context would sharpen the verdict.