There comes a point in a boxers career when they reach a certain status and the rise to fame & fortune becomes just too much to handle.
Nothing wrong with that it happens to them all. Monzon, Gomez, Pac, ODLH, Naz. They start making changes loads of people are whispering things in their ears and they begin to get blinded by these things. IMO sooner then later Tyson would have left Cus if nothing more then by some type of brivery by Don King.

It's hard to tell how their careers would have gone but one things certain IMO they were both 2 of the highest payed boxers in their respective div. at the time and all that money will change you sooner or later.