Willie Collazo vs. Brian Keyser — Career Comparison

Looking at the career totals, Willie Collazo and Brian Keyser are fairly close on the surface numbers. Brian Keyser posted stronger numbers in ERA (4.97 vs 6.35) and WHIP (1.684 vs 2.294). Willie Collazo had the advantage in home runs allowed (0 per nine innings vs 0.77). By the career numbers, Brian Keyser 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.