Bob Allen vs. Willie Collazo — Career Comparison

Looking at the career totals, Bob Allen and Willie Collazo are fairly close on the surface numbers. Bob Allen posted stronger numbers in ERA (4.11 vs 6.35) and WHIP (1.631 vs 2.294). Willie Collazo had the advantage in home runs allowed (0 per nine innings vs 0.76). By the career numbers, Bob Allen 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.