Boxing champion Tommy Morrison has died, aged 44. The former heavyweight champion passed away on Sunday (01Sep13) after a long battle with Guillain Barre Syndrome, according to DoghouseBoxing.com. The cause of death was respiratory and metabolic acidosis and multiple organ failure. Morrison beat George Foreman to win a WBO heavyweight title in 1993, but he quit the sport three years later (96) when he tested positive for HIV and was suspended from boxing in Nevada by the Nevada Athletic Commission. He briefly returned to the ring in 2007, insisting that his tests had been false positives. Outside the sport, Morrison played Tommy Gunn in Rocky V, and he also appeared in John Carpenter's They Live.