John Allen vs. Dave Leonhard — Career Comparison

Looking at the career totals, John Allen and Dave Leonhard are fairly close on the surface numbers. Dave Leonhard posted stronger numbers in ERA (3.15 vs 18) and WHIP (1.338 vs 2.000). John Allen had the advantage in home runs allowed (0 per nine innings vs 0.85). By the career numbers, Dave Leonhard 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.