Hayden Birdsong vs. Jim Mooney — Career Comparison

Looking at the career totals, Hayden Birdsong and Jim Mooney are fairly close on the surface numbers. Jim Mooney posted stronger numbers in ERA (4.25 vs 4.77) and home runs allowed (0.58 per nine innings vs 1.37). Hayden Birdsong had the advantage in WHIP (1.438 vs 1.570). By the career numbers, Jim Mooney 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.