Bronson Arroyo vs. Hayden Birdsong — Career Comparison

On the career pitching numbers, Bronson Arroyo posted a stronger line than Hayden Birdsong. Bronson Arroyo posted stronger numbers in ERA (4.28 vs 4.77) and WHIP (1.325 vs 1.438). By the career numbers, Bronson Arroyo 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.