Roscoe was a member of the Sakaaran Rebellion, who joined Korg and Miek on a slave revolt. Later, he fought alongside the remaining Asgardians against Hela and survived. He joined Korg, Miek and the Asgardian people in their journey towards Earth following the complete destruction of Asgard. However, on their way, the ship was ambushed by Thanos and the Black Order, and Roscoe was one of those who died fighting.
Joining the Rebellion
Roscoe joined the Sakaaran Rebellion when Valkyrie infiltrated into the gladiators' quarters and disabled their Obedience Disks. Along with the other Sakaaran rebels led by Korg, Roscoe made his way through the Grandmaster Palace. They ultimately reached the Grandmaster's garage, where they encountered Loki. Once Korg disabled Loki's Obedience Disk which had been planted by Thor, Roscoe followed him as Loki took the rebels aboard the Statesman in a journey to Asgard.
Roscoe joined the rest of the Sakaaran Rebellion during the Battle of the Rainbow Bridge. Along with Loki, Korg, Miek and Hajo, Roscoe fought to protect the Asgardians who boarded the Statesman to evacuate from Asgard and the tyrannical rule of Hela. Roscoe successfully held his own against several Berserkers, enabling the Asgardians to get onto the ship. Near the end of the battle, Roscoe then boarded the ship as well.
However, Hela stopped the spaceship by creating massive rock spikes which forced the Statesman to remain close to the Rainbow Bridge, enabling Berserkers to get onto the ship and threaten the Asgardian refugees. Roscoe attempted to hold them off until he was wounded in the leg by one undead soldier. However, due to Skurge deciding to turn against Hela and side with the Asgardians, Roscoe avoided death as Skurge killed the Berserkers, sacrificing himself. As the battle was over and the Statesman slowly left into space, Roscoe watched the Destruction of Asgard.
Roscoe remained in the Statesman as it made its course towards Earth. However, the spaceship was soon attacked by Thanos and the Black Order, who sought to reclaim the Tesseract. Roscoe fought against the Black Order, but ultimately met his demise and died in the ensuing battle during which half of the Asgardians were eliminated. Following the battle, Ebony Maw stepped over Roscoe's body while delivering his speech.
- Combatant: Being a survivor of the brutal battles in the Grand Arena, Roscoe was an above average fighter. He also survived a relentless onslaught of Hela's Berserkers whereas other skilled gladiators such as Hajo fell. However, Roscoe was no match to the mighty Black Order, who killed him during the Attack on the Statesman.