Dellin Betances vs. Bill Mack — Career Comparison

Looking at the career totals, Dellin Betances and Bill Mack are fairly close on the surface numbers. Dellin Betances posted stronger numbers in ERA (2.53 vs 3) and home runs allowed (0.59 per nine innings vs 1.5). Bill Mack had the advantage in WHIP (1.000 vs 1.085). By the career numbers, Dellin Betances 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.