Jason Isringhausen vs. Alex Singleton — Career Comparison

Looking at the career totals, Jason Isringhausen and Alex Singleton are fairly close on the surface numbers. Jason Isringhausen posted stronger numbers in ERA (3.64 vs 6.75) and WHIP (1.370 vs 2.250). Alex Singleton had the advantage in home runs allowed (0 per nine innings vs 0.76). By the career numbers, Jason Isringhausen 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.