George O'Donnell vs. Frank Viola — Career Comparison

Looking at the career totals, George O'Donnell and Frank Viola are fairly close on the surface numbers. Frank Viola posted stronger numbers in ERA (3.73 vs 4.53) and WHIP (1.315 vs 1.443). George O'Donnell had the advantage in home runs allowed (0.41 per nine innings vs 0.93). By the career numbers, Frank Viola 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.