Aroldis Chapman vs. Joel Johnston — Career Comparison

On the career pitching numbers, Aroldis Chapman posted a stronger line than Joel Johnston. Aroldis Chapman posted stronger numbers in ERA (2.52 vs 4.31) and WHIP (1.084 vs 1.296). By the career numbers, Aroldis Chapman had the better of this comparison — though ERA and WHIP alone don't account for era, park factors, or the defenses each pitcher worked behind.