John Ericks vs. Sean O'Sullivan — Career Comparison

On the career pitching numbers, John Ericks posted a stronger line than Sean O'Sullivan. John Ericks posted stronger numbers in ERA (4.78 vs 6.01) and WHIP (1.543 vs 1.616). By the career numbers, John Ericks 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.