Andrew Abbott vs. Sean O'Sullivan — Career Comparison

On the career pitching numbers, Andrew Abbott posted a stronger line than Sean O'Sullivan. Andrew Abbott posted stronger numbers in ERA (3.42 vs 6.01) and WHIP (1.245 vs 1.616). By the career numbers, Andrew Abbott 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.