Hayden Birdsong vs. Billy Campbell — Career Comparison

On the career pitching numbers, Billy Campbell posted a stronger line than Hayden Birdsong. Billy Campbell posted stronger numbers in ERA (2.8 vs 4.77) and WHIP (1.236 vs 1.438). By the career numbers, Billy Campbell 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.