Jack Armstrong vs. Art Lopatka — Career Comparison

Looking at the career totals, Jack Armstrong and Art Lopatka are fairly close on the surface numbers. Jack Armstrong posted stronger numbers in ERA (4.58 vs 6.35) and WHIP (1.458 vs 1.588). Art Lopatka had the advantage in home runs allowed (0.53 per nine innings vs 1.17). By the career numbers, Jack Armstrong 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.