Rogelio Armenteros vs. Ben Callahan — Career Comparison

Looking at the career totals, Rogelio Armenteros and Ben Callahan are fairly close on the surface numbers. Rogelio Armenteros posted stronger numbers in ERA (4 vs 12.54) and WHIP (1.222 vs 2.571). Ben Callahan had the advantage in home runs allowed (0 per nine innings vs 0.5). By the career numbers, Rogelio Armenteros 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.