Hayden Birdsong vs. Ben Callahan — Career Comparison

Looking at the career totals, Hayden Birdsong and Ben Callahan are fairly close on the surface numbers. Hayden Birdsong posted stronger numbers in ERA (4.77 vs 12.54) and WHIP (1.438 vs 2.571). Ben Callahan had the advantage in home runs allowed (0 per nine innings vs 1.37). 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.