Jack Leiter vs. Jonathan Pettibone — Career Comparison

Looking at the career totals, Jack Leiter and Jonathan Pettibone are fairly close on the surface numbers. Jonathan Pettibone posted stronger numbers in ERA (4.45 vs 4.8) and home runs allowed (0.91 per nine innings vs 1.2). Jack Leiter had the advantage in WHIP (1.361 vs 1.564). By the career numbers, Jonathan Pettibone 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.