Lefty Sullivan vs. Dale Thayer — Career Comparison

Looking at the career totals, Lefty Sullivan and Dale Thayer are fairly close on the surface numbers. Dale Thayer posted stronger numbers in ERA (3.47 vs 4.26) and WHIP (1.264 vs 1.421). Lefty Sullivan had the advantage in home runs allowed (0 per nine innings vs 1.07). By the career numbers, Dale Thayer 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.