John Allen vs. Rudy Arias — Career Comparison

Looking at the career totals, John Allen and Rudy Arias are fairly close on the surface numbers. Rudy Arias posted stronger numbers in ERA (4.09 vs 18) and WHIP (1.727 vs 2.000). John Allen had the advantage in home runs allowed (0 per nine innings vs 1.43). By the career numbers, Rudy Arias 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.