Aaron Laffey vs. Mitch Spence — Career Comparison

Looking at the career totals, Aaron Laffey and Mitch Spence are fairly close on the surface numbers. Aaron Laffey posted stronger numbers in ERA (4.44 vs 4.77) and home runs allowed (0.87 per nine innings vs 1.37). Mitch Spence had the advantage in WHIP (1.411 vs 1.535). By the career numbers, Aaron Laffey 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.