Watch: Mike Tyson concerns fans after slurring his words in this uncomfortable GMB interview
The heavyweight legend appeared to be slurring his words and breathing heavily in the live TV appearance. He could also be seen repeatedly touching his head, closing his eyes and dropping his head.
Tyson, 54, was being interviewed about his decision to come out of retirement to fight Roy Jones Junior.
“How do you feel, are you in the kind of nick you were in 15 years ago?” asked Morgan, to which Tyson replied: “Pretty much, I am just ready to do this, I feel really good, I am ready to do this.”
Many viewers tweeted their concern for Tyson, for whom it was late in the evening in Los Angeles at the time of the TV appearance.
"That was awkward viewing. Mike Tyson did not sound a well man. #GMB,” tweeted one person.
“Oh dear,” added another, “Mike’s not all there. He must have forgotten he was coming on TV! They need to wrap up this interview ASAP."
“Very uncomfortable viewing,” wrote a third.
Tyson and Jones Jr have been told that their planned return to the boxing ring is “plain dangerous and wrong” due to their ages and health by the brain injury association Headway.
Earlier this year, Tyson said his 2009 cameo in The Hangover came as a surprise to him, as he was “doing drugs” around that time.
He said it was only when he bumped into the film’s stars on a night out that he realised he was due to appear in it the next day.
Watch: Mike Tyson immobilized a shark on a dive for Discovery’s ‘Shark Week’