Jim Kaat vs. Tommy Thompson — Career Comparison

Looking at the career totals, Jim Kaat and Tommy Thompson are fairly close on the surface numbers. Jim Kaat posted stronger numbers in ERA (3.45 vs 6.06) and WHIP (1.284 vs 1.714). Tommy Thompson had the advantage in home runs allowed (0 per nine innings vs 0.78). By the career numbers, Jim Kaat 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.