Robert was finally contacted by individuals in the employment of billionaire Lex Luthor, who sought a pawn to assassinate Luthor's archenemy Superman. On learning that his brother had lost his limbs, DuBois went insane from guilt. Michael DuBois was sent into combat in Vietnam, where he lost both his arms and legs. DuBois' younger brother, Michael, reported for induction in his place, passing himself off as Robert.

Upon receiving his induction notice, DuBois fled to Canada, not because he was morally opposed to the war, but because he was afraid of death. DuBois was drafted to serve in the United States Armed Forces. Robert DuBois is a Vietnam draft evader, who had a mental breakdown and became obsessed with the Vietnam War after learning that his brother had gone in his stead. Demolitia, a female version of Bloodsport, is introduced by writer David Michelinie, and artists Kieron Dwyer and Denis Rodier in Action Comics #718 (February 1996), in which she procured Bloodsport's technology. The third incarnation, known as Bloodsport III, made his first appearance in Superman #652 (July 2006) and was created by writers Kurt Busiek and Geoff Johns, and artist Pete Woods.

The second incarnation, Alexander Trent, made his first appearance in The Adventures of Superman #507 (December 1993) and was created by writer Karl Kesel and artist Barry Kitson.

The character of Robert DuBois, created by writer and artist John Byrne, first appeared in Superman #4 (April 1987) as Bloodsport. In the DC Extended Universe, Robert DuBois is played by Idris Elba in the film The Suicide Squad (2021).

The Robert DuBois version of Bloodsport made his live-action debut in the television series Supergirl, played by David St. All of these versions exist in DC's main shared universe, known as the DC Universe. Bloodsport is the name of several supervillains appearing in American comic books published by DC Comics.

Download bloodshot first appearance