Roy Heiser vs. Fuller Thompson — Career Comparison

On the career pitching numbers, Fuller Thompson posted a stronger line than Roy Heiser. Fuller Thompson posted stronger numbers in ERA (3.86 vs 6.35) and WHIP (1.500 vs 2.647). By the career numbers, Fuller Thompson 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.