Willie Collazo vs. Mark Schaeffer — Career Comparison

Looking at the career totals, Willie Collazo and Mark Schaeffer are fairly close on the surface numbers. Mark Schaeffer posted stronger numbers in ERA (4.61 vs 6.35) and WHIP (2.000 vs 2.294). Willie Collazo had the advantage in home runs allowed (0 per nine innings vs 0.66). By the career numbers, Mark Schaeffer 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.