Graham Ashcraft vs. Adam Peterson — Career Comparison

On the career pitching numbers, Graham Ashcraft posted a stronger line than Adam Peterson. Graham Ashcraft posted stronger numbers in ERA (4.76 vs 5.46) and WHIP (1.421 vs 1.516). By the career numbers, Graham Ashcraft 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.