Willie Collazo vs. Mike Perez — Career Comparison

Looking at the career totals, Willie Collazo and Mike Perez are fairly close on the surface numbers. Mike Perez posted stronger numbers in ERA (3.56 vs 6.35) and WHIP (1.376 vs 2.294). Willie Collazo had the advantage in home runs allowed (0 per nine innings vs 0.68). By the career numbers, Mike Perez 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.