Joba Chamberlain vs. Humberto Robinson — Career Comparison

On the career pitching numbers, Humberto Robinson posted a stronger line than Joba Chamberlain. Humberto Robinson posted stronger numbers in ERA (3.25 vs 3.81) and home runs allowed (0.72 per nine innings vs 0.92). By the career numbers, Humberto Robinson 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.