Robbie Erlin vs. Duke Shirey — Career Comparison

Looking at the career totals, Robbie Erlin and Duke Shirey are fairly close on the surface numbers. Robbie Erlin posted stronger numbers in ERA (4.87 vs 6.75) and WHIP (1.297 vs 1.750). Duke Shirey 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.