Ray Caldwell vs. Carson Spiers — Career Comparison

On the career pitching numbers, Ray Caldwell posted a stronger line than Carson Spiers. Ray Caldwell posted stronger numbers in ERA (3.22 vs 5.69) and WHIP (1.261 vs 1.573). By the career numbers, Ray 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.