Carlos Frias vs. Del Mason — Career Comparison

On the career pitching numbers, Del Mason posted a stronger line than Carlos Frias. Del Mason posted stronger numbers in ERA (3.72 vs 4.5) and home runs allowed (0.19 per nine innings vs 0.87). By the career numbers, Del Mason 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.