Fred Mitchell vs. Carson Spiers — Career Comparison

On the career pitching numbers, Fred Mitchell posted a stronger line than Carson Spiers. Fred Mitchell posted stronger numbers in ERA (4.1 vs 5.69) and home runs allowed (0.2 per nine innings vs 1.85). By the career numbers, Fred Mitchell 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.