I don't see Pacquiao losing this fight. If he does lose, he should retire. More than likely though, he would rematch Bradley if he loses.
If he loses that coupled with his last two performances. I think he should retire. A fighter like Pac should never lose to someone like Bradley. If he does its like i said. Its time to focus on something else.
Bradley got off the canvas to win this fight and I doubt that Pacquiao has more pop on his punches than Kendall Holt...
Recent article Freddie Roach says he will tell Manny time to retire if he loses or looks really bad against Bradley. It's a pact they made before hand that if Manny starts to really show signs of slowing down that it was time to go.
Pac will fight well into his late 30's. He needs the money. He may say he will retire (a page out the Mayweather book), but he will defitnitely be back.