Alek Jacob vs. Lefty Sullivan — Career Comparison

Looking at the career totals, Alek Jacob and Lefty Sullivan are fairly close on the surface numbers. Alek Jacob posted stronger numbers in ERA (4.06 vs 4.26) and WHIP (1.216 vs 1.421). Lefty Sullivan had the advantage in home runs allowed (0 per nine innings vs 1.24). By the career numbers, Alek Jacob 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.