John Firth vs. Arnold Leon — Career Comparison

Looking at the career totals, John Firth and Arnold Leon are fairly close on the surface numbers. Arnold Leon posted stronger numbers in ERA (4.66 vs 8) and WHIP (1.586 vs 2.111). John Firth had the advantage in home runs allowed (0 per nine innings vs 1.24). By the career numbers, Arnold Leon 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.