Joba Chamberlain vs. Ryota Igarashi — Career Comparison

On the career pitching numbers, Joba Chamberlain posted a stronger line than Ryota Igarashi. Joba Chamberlain posted stronger numbers in ERA (3.81 vs 6.41) and WHIP (1.408 vs 1.849). By the career numbers, Joba Chamberlain 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.