Rogelio Armenteros vs. John Duffie — Career Comparison

Looking at the career totals, Rogelio Armenteros and John Duffie are fairly close on the surface numbers. Rogelio Armenteros posted stronger numbers in WHIP (1.222 vs 1.655) and home runs allowed (0.5 per nine innings vs 0.93). John Duffie had the advantage in ERA (2.79 vs 4). 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.