Aroldis Chapman vs. Ed Donnelly — Career Comparison

Ed Donnelly built a career as a starting pitcher and Aroldis Chapman as a reliever — different jobs with different demands — but on the metrics that apply to both, a comparison is still worth making. Aroldis Chapman posted stronger surface numbers — ERA 2.52 and WHIP 1.084 compared to 4.03 and 1.534 for Ed Donnelly. By the career numbers, Aroldis Chapman had the better of this cross-role comparison — though era context would sharpen the verdict.