Willie Collazo vs. Ed O'Neil — Career Comparison

Looking at the career totals, Willie Collazo and Ed O'Neil are fairly close on the surface numbers. Willie Collazo had the edge in ERA (6.35 vs 9.26). By the career numbers, Willie Collazo 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.