He is making money without breaking a sweat. He will not give up that record because if he did, his market value will go down and Senator Manny's market value will skyrocket.
Definitely, the way I understand on his statement, it seems there is no rematch happening.
Both will retire as good fighter but Manny will remain the legend between the two despite he was beaten by Mayweather.
People doesn't care of the record anymore, they care for what the fighter can give and that's what Manny are doing.