Former four division champion Roy Jones Jr. is expecting a Floyd Mayweather (49-0, 26 KOs) victory by way of knockout, when the unbeaten boxer returns to face UFC superstar Conor McGregor.

Mayweather will square up against McGregor on August 26th from the T-Mobile Arena in Las Vegas.

McGregor, who is captured two divisional titles in the UFC and is widely regarded as one of the best MMA fighters in the world, will be making his professional debut as a boxer.

 

Mayweather, 40 years old, will be making his return after two years of retirement.

Jones, who at age 48 continues to fight, knows a lot about competing in the later stages of his career. He fully backs a Mayweather win, but also says the former pound-for-pound king will suffer a major stain to his legacy if McGregor pulls it off.

“The fight will be only as competitive as Floyd Mayweather allows it to be. In terms of tactics, no tactics will be affective against Floyd unless he can make Floyd brawl right away. Floyd’s age will not be a factor at all," Jones told ?Talking With TK.

"Conor’s punching power will be significantly lower with 10 ounce gloves on compared to the UFC's 4 ounce gloves. Rounds will be a factor late, because Conor McGregor has never went close to 12 rounds before. If McGregor wins Floyds legacy is done, however I think Floyd Mayweather wins via stoppage”

Former junior middleweight champion Austin Trout is also backing a Mayweather win by stoppage, but expects McGregor to give it a real go in the early rounds of the contest.

“For McGregor, I think people are underestimating his grit. He's going to make a fight of it and try to take Floyd’s head off. Taking time off [like Floyd did], ring rust is real. However, I feel Floyd will win by late stoppage," Trout said. 

"Conor has given up before, Floyd does have the power to stop him. MMA fighters are not accustomed to being punched repeatedly. [Floyd] even stopped Canelo in his tracks. I notice a major thing; MMA fighters don’t take a punch the same way as a boxer. Not that they can’t take a punch, but how they react to the punch.”