Keith Hessler vs. Jerrod Riggan — Career Comparison

Looking at the career totals, Keith Hessler and Jerrod Riggan are fairly close on the surface numbers. Jerrod Riggan posted stronger numbers in ERA (5.19 vs 5.56) and home runs allowed (0.83 per nine innings vs 1.59). Keith Hessler had the advantage in WHIP (1.765 vs 1.835). By the career numbers, Jerrod Riggan 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.