Doug was a former contestant in the Contest of Champions on Sakaar, who died after his fight against the Hulk.
Killed in the Arena
Doug ended up in Sakaar where he was forced to be a gladiator for Grandmaster in the Contest of Champions. He befriended his fellow contestants, Korg and Miek. Doug was killed from his injuries in his fight against the champion.
Doug's Mace and Shield were later given to the Asgardian Thor, who used them in the Duel in the Grand Arena.