Sammy Peralta vs. John Roach — Career Comparison

Looking at the career totals, Sammy Peralta and John Roach are fairly close on the surface numbers. Sammy Peralta posted stronger numbers in ERA (5.12 vs 11.25) and WHIP (1.774 vs 2.750). John Roach had the advantage in home runs allowed (0 per nine innings vs 0.79). By the career numbers, Sammy Peralta 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.