Brett Anderson vs. Michael Mercado — Career Comparison

On the career pitching numbers, Brett Anderson posted a stronger line than Michael Mercado. Brett Anderson posted stronger numbers in ERA (4.07 vs 11.81) and WHIP (1.345 vs 2.250). By the career numbers, Brett Anderson 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.