Morrales was getting slower, and not as good for a few fights before for fighitng Pacquaio already by his last fight with Barrera there was a huge difference in how he fought then when they first fought. This is not to mention that Morrales and Barrera to a lesser extent IMO are not the type of fighters I consider to be like Hopkins or Lennox who have become more effective with age. I agree Pacquaio is good, but he gets rolled p4p against Mayweather, and about his weight he came in smaller than Morrales in their first fight and he lost. He has been as big or bigger in the last two fights and it showed that he wasn't the smaller man anymore. Morrales beat Pacquaio clearly in the first fight, and I believe if they fought in his prime it would be similar to that except worse for Pacquaio because Morrales used to hit harder, and same with Barrera.