Aroldis Chapman vs. Andrew Saalfrank — Career Comparison

Looking at the career totals, Aroldis Chapman and Andrew Saalfrank are fairly close on the surface numbers. Andrew Saalfrank posted stronger numbers in ERA (1.79 vs 2.52) and home runs allowed (0.22 per nine innings vs 0.59). Aroldis Chapman had the advantage in WHIP (1.084 vs 1.215). By the career numbers, Andrew Saalfrank 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.