Yilber Díaz vs. Jack Leiter — Career Comparison

Looking at the career totals, Yilber Díaz and Jack Leiter are fairly close on the surface numbers. Yilber Díaz posted stronger numbers in ERA (4.31 vs 4.8) and home runs allowed (0.86 per nine innings vs 1.2). Jack Leiter had the advantage in WHIP (1.361 vs 1.468). By the career numbers, Yilber Díaz 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.