Adam Peterson vs. Andy Pettitte — Career Comparison

On the career pitching numbers, Andy Pettitte posted a stronger line than Adam Peterson. Andy Pettitte posted stronger numbers in ERA (3.85 vs 5.46) and WHIP (1.363 vs 1.516). By the career numbers, Andy Pettitte 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.