Sean O'Sullivan vs. Spenser Watkins — Career Comparison

Looking at the career totals, Sean O'Sullivan and Spenser Watkins are fairly close on the surface numbers. Spenser Watkins had the edge in WHIP (1.527 vs 1.616). By the career numbers, Spenser Watkins 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.