Willie Collazo vs. Joe Kelly — Career Comparison

Looking at the career totals, Willie Collazo and Joe Kelly are fairly close on the surface numbers. Joe Kelly posted stronger numbers in ERA (3.98 vs 6.35) and WHIP (1.381 vs 2.294). Willie Collazo had the advantage in home runs allowed (0 per nine innings vs 0.78). By the career numbers, Joe Kelly 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.