Robbie Erlin vs. Unknown Princeton — Career Comparison

Looking at the career totals, Robbie Erlin and Unknown Princeton are fairly close on the surface numbers. Robbie Erlin posted stronger numbers in ERA (4.87 vs 12) and WHIP (1.297 vs 3.333). Unknown Princeton had the advantage in home runs allowed (0 per nine innings vs 1.13). By the career numbers, Robbie Erlin 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.