Tyson MIGHT have gotten Marciano- the 1950's version- put Marciano on a modern day training regimen- no way Tyson gets him, The Rock had too much heart, stamina and determination, and he wouldn't have feared Tyson, he would have taken Tyson into the later rounds and finished him
Holmes would have sliced up Tyson, his jab was too good, right was lethal, had heart of a lion.... Tyson beat an old man who should of had a tune up fight or two
Ali would have gotten inside Tysons head and beat him BEFORE the fight even started- too much speed, heart, determination... he would of decimated Tyson just like Liston-
Frazier, Holmes, Foreman, Louis , Lewis, Bowe, Liston, a few others ALL beat Tyson