Hayden Birdsong vs. Mike Campbell — Career Comparison

On the career pitching numbers, Hayden Birdsong posted a stronger line than Mike Campbell. Hayden Birdsong posted stronger numbers in ERA (4.77 vs 5.86) and home runs allowed (1.37 per nine innings vs 1.7). By the career numbers, Hayden Birdsong 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.