Ryota Igarashi vs. Roger Mason — Career Comparison

On the career pitching numbers, Roger Mason posted a stronger line than Ryota Igarashi. Roger Mason posted stronger numbers in ERA (4.02 vs 6.41) and WHIP (1.367 vs 1.849). By the career numbers, Roger 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.