Yilber Díaz vs. Roy Smith — Career Comparison

Yilber Díaz built a career as a starting pitcher and Roy Smith as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Yilber Díaz posted stronger surface numbers — ERA 4.31 and WHIP 1.468 compared to 5.24 and 1.970 for Roy Smith. By the career numbers, Yilber Díaz had the better of this cross-role comparison — though era context would sharpen the verdict.