George O'Donnell vs. Hippo Vaughn — Career Comparison

On the career pitching numbers, Hippo Vaughn posted a stronger line than George O'Donnell. Hippo Vaughn posted stronger numbers in ERA (2.49 vs 4.53) and WHIP (1.201 vs 1.443). By the career numbers, Hippo Vaughn 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.