That's not true. He was at around 215-225 for most of his fights, sometimes heavier, and relatively early in his career also. Ali was a BIG man.
I agree that Roy does have the edge on pure handspeed, but he didn't have many fights at heavyweight, so it's harder to judge. And Ruiz is nowhere near the oppponent that Sonny Liston, Floyd Patterson, Joe Frazier, George Foreman, etc. were.
So keep in mind that Ali was a MUCH bigger man who was nearly as fast as Roy, and hit harder.
I don't think that Jones ever really fought anyone of Ali's caliber. On top of that, the thing is that Ali has all of the positive tributes of Ali, but he was a better actual boxer. Roy relied so much on his natural talent that when he got in trouble, he didn't know what to do.
Ali would have landed enough flush shots to knock Roy out.
I used to think this, but really, look at the list of who he beat. Every great fighter, every big name, for 15 years, and he fought them all and in their primes- and won.
I think maybe Joe Louis would have beat him, I think maybe Rocky Marciano would have wore him down, I think he'd have a hard time with the pure size of those russian cunts that rule the division today.
But as for all time ability, plus the amount of legends he beat, makes him "The Greatest of All Time."