Hayden Birdsong vs. Wilbur Cooper — Career Comparison

On the career pitching numbers, Wilbur Cooper posted a stronger line than Hayden Birdsong. Wilbur Cooper posted stronger numbers in ERA (2.89 vs 4.77) and WHIP (1.226 vs 1.438). By the career numbers, Wilbur Cooper 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.