George Diehl vs. Lefty Sullivan — Career Comparison

Looking at the career totals, George Diehl and Lefty Sullivan are fairly close on the surface numbers. George Diehl had the edge in ERA (3.52 vs 4.26). By the career numbers, George Diehl 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.