Aaron Ashby vs. Hayden Birdsong — Career Comparison

On the career pitching numbers, Aaron Ashby posted a stronger line than Hayden Birdsong. Aaron Ashby posted stronger numbers in ERA (3.62 vs 4.77) and WHIP (1.274 vs 1.438). By the career numbers, Aaron Ashby 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.