Bill James vs. Don Kaiser — Career Comparison

On the career pitching numbers, Bill James posted a stronger line than Don Kaiser. Bill James posted stronger numbers in ERA (3.2 vs 4.15) and home runs allowed (0.12 per nine innings vs 0.79). By the career numbers, Bill James 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.