The Earth-1 version was Martin Mantle, Jr. and appeared only in "Batman" #338 (1981). During Mantle's youth, his father, disgusted by his son's poor athletic performance, forcibly subjected him to unsafe enhancement treatment in a twisted attempt to make him more "manly". Although emotionally scarred by the incident, Mantle indeed grew up to become a champion athlete, only to learn his father's procedure was altering his body in a way that would eventually kill him. As the Sportsman, he embarked on a brief life of crime with Olympian-level physical attributes and specialized equipment of his own design. His adversary was the Silver Age Batman who allowed him to "win" once he became aware that Mantle's life was nearing its end.