Bob Allen vs. Sandy Rosario — Career Comparison

Looking at the career totals, Bob Allen and Sandy Rosario are fairly close on the surface numbers. Bob Allen posted stronger numbers in ERA (4.11 vs 4.93) and WHIP (1.631 vs 1.784). Sandy Rosario had the advantage in home runs allowed (0.55 per nine innings vs 0.76). By the career numbers, Bob Allen 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.