Conor McGregor opens as 10-to-1 favorite in potential MMA fight with Floyd Mayweather.

There has been enough talk of a potential Floyd Mayweather Jr. vs. Conor McGregor rematch in the UFC that two different betting lines have been released.

Bovada a few days ago released a line with McGregor as a -900 favorite. Westgate released Monday a more publicized line of McGregor as a -1000 favorite and Mayweather at +650.

That would mean someone would have to bet $10 to win $1 on a McGregor bet. A Mayweather bet of $10 would win $65 if he were to win the fight.

The current stipulations for Westgate are that the fight must take place under MMA rules before Sept. 1, 2019 and has a $2,000 betting max.

Such a fight would have been considered almost impossible a few months ago, but Mayweather has made noise in recent weeks about training with Tyron Woodley for a bout in the Octagon.

It’s notable that when the Mayweather vs. McGregor boxing match was announced, most odds favored Mayweather by -1400 to -1100. Those numbers closed, at times as low as -300, due to so many bets being placed on McGregor. Most places were still offering the fight at -700 at fight time.