Rogelio Armenteros vs. Wei-Yin Chen — Career Comparison

On the career pitching numbers, Rogelio Armenteros posted a stronger line than Wei-Yin Chen. Rogelio Armenteros posted stronger numbers in ERA (4 vs 4.18) and WHIP (1.222 vs 1.289). 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.