Kolby Allard vs. Oliver Perez — Career Comparison

Looking at the career totals, Kolby Allard and Oliver Perez are fairly close on the surface numbers. Oliver Perez posted stronger numbers in ERA (4.37 vs 5.34) and home runs allowed (1.22 per nine innings vs 1.6). Kolby Allard had the advantage in WHIP (1.409 vs 1.459). By the career numbers, Oliver 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.