Heliodoro Díaz vs. Mike Willis — Career Comparison

Heliodoro Díaz built a career as a starting pitcher and Mike Willis as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Heliodoro Díaz posted stronger surface numbers — ERA 4.35 and WHIP 1.405 compared to 4.59 and 1.524 for Mike Willis. By the career numbers, Heliodoro Díaz had the better of this cross-role comparison — though era context would sharpen the verdict.