Willie Collazo vs. Atahualpa Severino — Career Comparison

Looking at the career totals, Willie Collazo and Atahualpa Severino are fairly close on the surface numbers. Atahualpa Severino posted stronger numbers in ERA (3.86 vs 6.35) and WHIP (1.286 vs 2.294). Willie Collazo had the advantage in home runs allowed (0 per nine innings vs 1.93). By the career numbers, Atahualpa Severino 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.