Unknown Allen vs. Oliver Perez — Career Comparison

Looking at the career totals, Unknown Allen and Oliver Perez are fairly close on the surface numbers. Oliver Perez posted stronger numbers in ERA (4.37 vs 40.5) and WHIP (1.459 vs 7.500). Unknown Allen had the advantage in home runs allowed (0 per nine innings vs 1.22). 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.