Hayden Birdsong vs. Johnny Marcum — Career Comparison

On the career pitching numbers, Johnny Marcum posted a stronger line than Hayden Birdsong. Johnny Marcum posted stronger numbers in ERA (4.66 vs 4.77) and home runs allowed (0.74 per nine innings vs 1.37). By the career numbers, Johnny Marcum 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.