Is the only way Pacquiao can get credit for beating Mosley be by knockout?

Pacquiao needs no more credit, Nat. P4P King, Fighter of the Decade and 8 Division titles are already written next to his name. He's the only one fighting Congressman. I've been saying this all the time. Shane needs one more fight before going to retirement. Let us give the man the opportunity to fight his last big one. Marquez, Berto or whoever out there can wait. Shane can not.