Aroldis Chapman vs. George Mack — Career Comparison

George Mack 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 7.19 and 1.890 for George Mack. By the career numbers, Aroldis Chapman had the better of this cross-role comparison — though era context would sharpen the verdict.