"My niece said my son told her he wanted to fight Pacquiao next, and that he wants me to train him for the fight," Mayweather Sr. said.

Bernice Mayweather said she was not surprised to hear her grandson -- a five-division champion with a 39-0 record, who last fought Dec. 8, 2007 -- wants to return to the ring.

"I always said he was going to fight again," she said. "It was just a matter of time. He was waiting until the time is right. And the time is right. I knew he was going to come out of retirement -- he did it before, didn't he?"