Jack Aker vs. Atahualpa Severino — Career Comparison

Looking at the career totals, Jack Aker and Atahualpa Severino are fairly close on the surface numbers. Jack Aker posted stronger numbers in ERA (3.28 vs 3.86) and home runs allowed (0.77 per nine innings vs 1.93). Atahualpa Severino had the advantage in WHIP (1.286 vs 1.369). By the career numbers, Jack Aker 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.