Frank Stewart vs. Lefty Thomas — Career Comparison

On the career pitching numbers, Lefty Thomas posted a stronger line than Frank Stewart. Lefty Thomas posted stronger numbers in ERA (3.32 vs 9) and WHIP (1.800 vs 2.250). By the career numbers, Lefty Thomas 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.