Hal Kolstad vs. Jerrod Riggan — Career Comparison

Looking at the career totals, Hal Kolstad and Jerrod Riggan are fairly close on the surface numbers. Jerrod Riggan posted stronger numbers in ERA (5.19 vs 6.59) and home runs allowed (0.83 per nine innings vs 1.87). Hal Kolstad had the advantage in WHIP (1.700 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.