Don Carlsen vs. Don Kaiser — Career Comparison

On the career pitching numbers, Don Kaiser posted a stronger line than Don Carlsen. Don Kaiser posted stronger numbers in ERA (4.15 vs 6) and WHIP (1.458 vs 1.778). By the career numbers, Don Kaiser 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.