Bob Anderson vs. Adam Peterson — Career Comparison

On the career pitching numbers, Bob Anderson posted a stronger line than Adam Peterson. Bob Anderson posted stronger numbers in ERA (4.26 vs 5.46) and WHIP (1.437 vs 1.516). By the career numbers, Bob 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.