John Dettmer vs. Jack Leiter — Career Comparison

Looking at the career totals, John Dettmer and Jack Leiter are fairly close on the surface numbers. Jack Leiter posted stronger numbers in WHIP (1.361 vs 1.620) and home runs allowed (1.2 per nine innings vs 1.66). John Dettmer had the advantage in ERA (4.47 vs 4.8). By the career numbers, Jack Leiter 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.