Oswaldo Mairena vs. Zach McAllister — Career Comparison

On the career pitching numbers, Zach McAllister posted a stronger line than Oswaldo Mairena. Zach McAllister posted stronger numbers in ERA (4.15 vs 6.06) and WHIP (1.412 vs 1.654). By the career numbers, Zach McAllister 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.