Mike Caldwell vs. Robert Ray — Career Comparison

On the career pitching numbers, Mike Caldwell posted a stronger line than Robert Ray. Mike Caldwell posted stronger numbers in ERA (3.81 vs 4.18) and home runs allowed (0.81 per nine innings vs 1.29). By the career numbers, Mike Caldwell 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.