Wily Peralta vs. Mitch Spence — Career Comparison

On the career pitching numbers, Wily Peralta posted a stronger line than Mitch Spence. Wily Peralta posted stronger numbers in ERA (4.29 vs 4.77) and home runs allowed (1.09 per nine innings vs 1.37). By the career numbers, Wily 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.