George O'Donnell vs. Frank Thompson — Career Comparison

On the career pitching numbers, Frank Thompson posted a stronger line than George O'Donnell. Frank Thompson posted stronger numbers in ERA (3.51 vs 4.53) and WHIP (1.274 vs 1.443). By the career numbers, Frank Thompson 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.