Jack Cullen vs. George O'Donnell — Career Comparison

Looking at the career totals, Jack Cullen and George O'Donnell are fairly close on the surface numbers. Jack Cullen had the edge in ERA (3.07 vs 4.53). By the career numbers, Jack Cullen 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.