Army Cooper vs. Robbie Erlin — Career Comparison

Looking at the career totals, Army Cooper and Robbie Erlin are fairly close on the surface numbers. Army Cooper posted stronger numbers in ERA (4.36 vs 4.87) and home runs allowed (0.19 per nine innings vs 1.13). Robbie Erlin had the advantage in WHIP (1.297 vs 1.436). By the career numbers, Army Cooper 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.