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Changes in Betting Patterns Shape New Odds for Mayweather vs. McGregor

New betting patterns show differences could be in store just a couple short days before the fight.

Despite the belief from many long-time boxing fans and bettors that the 49-0 Floyd Mayweather should have no trouble defeating MMA star Conor McGregor this weekend, the betting public has gone the other way in the months leading up to the fight.

Some big movement just days before the fight, however, suggests that the action could start leaning the other way.

Floyd Mayweather is now a -650 betting favorite to win his super fight against Conor McGregor at some Vegas sportsbooks. The shift comes after heavy betting action on Mayweather came in Thursday in Las Vegas. This action reportedly included two seven-figure bets on Mayweather to win of $1.2 million and $1 million, as well as a handful of six figure bets in the range of $200,000 to $300,000.

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These new odds make McGregor a +475 underdog to win the fight Saturday night.

Some sportsbooks monitored by have not been as fast to adjust the odds, leaving Mayweather alone as a -450 favorite with McGregor at +325. McGregor has received enough betting action to this point that many books stand to lose a lot of money if the UFC fighter pulls off the upset.

Each sportsbook will have to measure the risk of taking on huge bets for Mayweather for Saturday's fight if they keep the line where it is despite the risk of inviting more action on McGregor with a big line shift. And bettors are likely to line shop before placing any last-minute wagers.

The news of the big bets coming in on Mayweather dominated Thursday's headlines after earlier headlines leading up to the fight were about the change in glove size. After a successful appeal from both sides to the Nevada State Athletic Commission, the fight will now take place with 8-ounce gloves instead of 10-ounce gloves.

That decision elicited more betting action on McGregor, who figured to gain the advantage with smaller gloves allowing for harder and quicker punches. The popular prop bet for McGregor is to win by KO, TKO or DQ is going off at odds of +325 for Saturday.