Roger Clemens vs. Don Kaiser — Career Comparison

On the career pitching numbers, Roger Clemens posted a stronger line than Don Kaiser. Roger Clemens posted stronger numbers in ERA (3.12 vs 4.15) and WHIP (1.185 vs 1.458). By the career numbers, Roger Clemens 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.