Aroldis Chapman vs. John Mickey — Career Comparison

John Mickey 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 6.14 and 1.909 for John Mickey. By the career numbers, Aroldis Chapman had the better of this cross-role comparison — though era context would sharpen the verdict.