George O'Donnell vs. Justin Thompson — Career Comparison

Looking at the career totals, George O'Donnell and Justin Thompson are fairly close on the surface numbers. Justin Thompson posted stronger numbers in ERA (4.02 vs 4.53) and WHIP (1.350 vs 1.443). George O'Donnell had the advantage in home runs allowed (0.41 per nine innings vs 1.01). By the career numbers, Justin 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.