Ron Keller vs. Jerrod Riggan — Career Comparison

Looking at the career totals, Ron Keller and Jerrod Riggan are fairly close on the surface numbers. Ron Keller posted stronger numbers in ERA (3.38 vs 5.19) and WHIP (1.453 vs 1.835). Jerrod Riggan had the advantage in home runs allowed (0.83 per nine innings vs 1.27). By the career numbers, Ron Keller 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.