Jim Hannan vs. Jack Leiter — Career Comparison

Looking at the career totals, Jim Hannan and Jack Leiter are fairly close on the surface numbers. Jim Hannan posted stronger numbers in ERA (3.88 vs 4.8) and home runs allowed (0.86 per nine innings vs 1.2). Jack Leiter had the advantage in WHIP (1.361 vs 1.511). By the career numbers, Jim Hannan 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.