I think Manny will still try to knock out every opponent of his. But the problem is that he has aged already plus the moved up in weight and fighting bigger guys has somewhat "stop" him from KO opponents. I hope Manny will KO Horn so that he can still see him fight more. But if he retires, then we would all understand it and pursue other things like his political career in the Philippines.
That is also my concern, since he is getting older. It affects his movement maybe but he has still the energy. Me too are hoping for a KO by Pacquiao. Horn is a challenger, he has to exert more effort to pinned down Pacquiao, that is a unanimous decision .