Tony did a lot in his lifetime: wrote books, did pro wrestling, boxing, mma, strongmen challenges, went into politics with a record breaking vote total etc. He was a nice guy and a friend of my father, i never met him, but both of my brothers did and said he was very cool and calm...
He had a few strokes and other health issues and he said it himself that his brains "are in and out" he also said (in an interview) that he was depressed and had been for a long time, so all in all not a big suprise, but very sad none the less.
RIP