Santiago Casilla vs. Bill Sullivan — Career Comparison

Looking at the career totals, Santiago Casilla and Bill Sullivan are fairly close on the surface numbers. Santiago Casilla posted stronger numbers in ERA (3.29 vs 7.93) and WHIP (1.336 vs 1.857). Bill Sullivan had the advantage in home runs allowed (0.43 per nine innings vs 0.81). By the career numbers, Santiago Casilla 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.