He's been in decline since his layoff after the Ricky Hatton fight. Just IMO. Hasn't had that same spring in his step since. To turn a phrase.... "He's lost a step." We'll see Saturday if he has lost more, or if the move back to 147 benefits. The two times he's been at 154 he's looked a bit sluggish as well.
tough fights are what makes fighters age more. He has not had really tough fights. Cotto was tough, but not many more.