Robin Roberts vs. Lefty Williams — Career Comparison

Looking at the career totals, Robin Roberts and Lefty Williams are fairly close on the surface numbers. Lefty Williams posted stronger numbers in ERA (3.13 vs 3.41) and home runs allowed (0.23 per nine innings vs 0.97). Robin Roberts had the advantage in WHIP (1.184 vs 1.238). By the career numbers, Lefty Williams 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.