Manny Acosta vs. Oswaldo Mairena — Career Comparison

On the career pitching numbers, Manny Acosta posted a stronger line than Oswaldo Mairena. Manny Acosta posted stronger numbers in ERA (3.99 vs 6.06) and WHIP (1.456 vs 1.654). By the career numbers, Manny Acosta 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.