Jack Armstrong vs. Rube Marshall — Career Comparison

Looking at the career totals, Jack Armstrong and Rube Marshall are fairly close on the surface numbers. Rube Marshall posted stronger numbers in ERA (4.17 vs 4.58) and home runs allowed (0.19 per nine innings vs 1.17). Jack Armstrong had the advantage in WHIP (1.458 vs 1.562). By the career numbers, Rube Marshall 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.