Juan Mejia vs. Lou Polli — Career Comparison

Looking at the career totals, Juan Mejia and Lou Polli are fairly close on the surface numbers. Juan Mejia posted stronger numbers in ERA (3.96 vs 4.68) and WHIP (1.272 vs 1.843). Lou Polli had the advantage in home runs allowed (0.64 per nine innings vs 0.88). By the career numbers, Juan Mejia 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.