Sean O'Sullivan vs. Blake Walston — Career Comparison

Looking at the career totals, Sean O'Sullivan and Blake Walston are fairly close on the surface numbers. Blake Walston posted stronger numbers in ERA (4.42 vs 6.01) and WHIP (1.418 vs 1.616). Sean O'Sullivan had the advantage in home runs allowed (1.64 per nine innings vs 1.96). By the career numbers, Blake Walston 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.