However, the big bets only tell one side of the story. ‘The Notorious’ was initially a 7/1 shot to beat ‘Money’ Mayweather (1/16) when William Hill first opened their betting market in December 2016. Since then the weight of money on the Irishman has seen his odds tumble down to 10/3, while Mayweather’s odds have drifted from 1/16 to 2/9 with William Hill. On Thursday, Purdum reported a pair of $1 million bets on Mayweather were submitted in Las Vegas at the MGM and William Hill. One bettor had Mayweather at -550 (bet $550 to win $100) while the other took him at -500. LAS VEGAS -- Floyd Mayweather Jr. will come out of retirement to meet UFC star Conor McGregor in an Aug. 26 boxing match that will feature two of the top-selling fighters in the world. Jon Jones vs Stipe Miocic There have also been big Mayweather bets at the MGM Grand, including a $500,000 wager on Wednesday at the MGM Grand and a $1 million bet Thursday at William Hill. That reduces the todays correct score betting tips liability some, though MGM Resorts oddsmaker Jay Rood said the sheer volume of McGregor bets at long odds still overwhelm big Mayweather bets.