Keith Foulke vs. Mason Thompson — Career Comparison

Looking at the career totals, Keith Foulke and Mason Thompson are fairly close on the surface numbers. Keith Foulke posted stronger numbers in ERA (3.33 vs 5.21) and WHIP (1.106 vs 1.667). Mason Thompson had the advantage in home runs allowed (0.87 per nine innings vs 1.08). By the career numbers, Keith Foulke 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.