Beckham says "nothing has been confirmed yet, but it's something I am very excited about."
He adds that "Miami is something that really excites me because there is a great energy down there. They are ready for a football team in that part of the world."
Beckham was speaking at a promotional event at The Venetian casino in Macau. He is expected to attend Saturday's WBO welterweight title fight between Manny Pacquiao and Brandon Rios at The Venetian.