Dave Heaverlo vs. Nelson Thomas — Career Comparison

On the career pitching numbers, Nelson Thomas posted a stronger line than Dave Heaverlo. Nelson Thomas posted stronger numbers in ERA (1.59 vs 3.41) and WHIP (1.059 vs 1.492). By the career numbers, Nelson Thomas 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.