History
James Darnell was one of the U-Foes members, under the code-name of X-Ray.
He was in the Cube among his teammates in a specialized cell until the Breakout.[1]
After escaping, he was with the U-Foes helping the Leader by defending the Gamma Generator from the Avengers and S.H.I.E.L.D. agents in radiation suits, but he and his teammates were defeated after the generator was destroyed.[2]
His current whereabouts are unknown.