I think Majesty is right, Roy should change his style up a bit. If you look at the fighters who really lasted a long time they adapted to what their bodies were and were not able to do.

Look at these two guys:

Muhammad Ali: Young- up on his toes, moving, using flashy speed, combos. OLD - on the ropes, clinching, seldom moving, using flurries less often but still effective, did what he could to last the distance and win by UD and didn't focus on power.

Mike Tyson: Young - combinations, good head movement, good defense, great hand speed. OLD - 1 punch at a time, no defense, no head movement, less combinations, basically only a 4 round fighter.

Roy Jones needs to use his speed, have less early focus on power, focus on carrying power late into fights, use the ropes, more defense, and box more instead of overwhelming guys with his handspeed and power. The key is to use the one punch he never used to use....THE JAB!!!