Sammy Peralta vs. Sandy Rosario — Career Comparison

On the career pitching numbers, Sandy Rosario posted a stronger line than Sammy Peralta. Sandy Rosario posted stronger numbers in ERA (4.93 vs 5.12) and home runs allowed (0.55 per nine innings vs 0.79). By the career numbers, Sandy Rosario 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.