Keith Brown vs. Oswaldo Mairena — Career Comparison

On the career pitching numbers, Keith Brown posted a stronger line than Oswaldo Mairena. Keith Brown posted stronger numbers in ERA (3.4 vs 6.06) and WHIP (1.469 vs 1.654). By the career numbers, Keith Brown 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.