HBO Boxing broadcast analyst Jim Lampley is convinced that former five division world champion Floyd Mayweather Jr. (50-0, 27 KOs) will return to the ring once again - likely for a rematch with UFC superstar Conor McGregor.

Back in August, the 40 year old Mayweather snapped a two year retirement to face McGregor, who was making his pro debut as a boxing, at the T-Mobile Arena in Las Vegas.

McGregor came out guns blazing and swept the first three to four rounds, before Mayweather made adjustments and took over the entire fight. He finally stopped an exhausted McGregor in the tenth round.

After the fight, Mayweather announced his retirement from the sport.

But recently, Mayweather has begun posting training videos and he appears to be in shape. And McGregor has been actively calling for a Mayweather rematch.

Their pay-per-view fight was a homerun - it generated over 4 million pay-per-view purchases and banked each fighter over 100 million.

Lampley strongly believes that Mayweather allowed McGregor to win the early rounds, and then carried him, to create the illusion of a competitive fight so they could fight again.

"Why should he retire? He created a marvelous scam with this whole thing," Lampley said to TMZ.

"He allowed Conor to quote 'win' three rounds so that the whole global MMA wish community could have something to latch on to. I think there's a decent chance there's enough suckers out there Floyd could maybe make another $150 million, why not?" 

"Oh yeah, obviously [he put out those videos to build a rematch]. Did you just associate the word 'risk' with Floyd Mayweather. Risk has nothing to do with it. Risk is not involved with [a McGregor rematch]. Are we having a bet on whether or not Floyd Mayweather wants to make another $150 million? It's not a bet. Why else is he putting out videos of himself working out? Why else did he allow Conor McGregor to 'win' three rounds? Why did the whole thing last ten rounds? It's all a set up."