Aaron Cook vs. Robbie Erlin — Career Comparison

Looking at the career totals, Aaron Cook and Robbie Erlin are fairly close on the surface numbers. Aaron Cook posted stronger numbers in ERA (4.6 vs 4.87) and home runs allowed (0.81 per nine innings vs 1.13). Robbie Erlin had the advantage in WHIP (1.297 vs 1.500). By the career numbers, Aaron Cook 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.