Heavy, one-sided McGregor betting has created huge exposure and liability for the books. If McGregor is able to pull off the upset, public bettors will be rewarded with a massive plus-money payout, which would be a nightmare for the books.


“This could be the worst loss in the history of MGM Resorts,” Jay Rood, VP of MGM, told ESPN.



Needless to say, the books will be rooting hard for Mayweather to run his record to 50-0 on Saturday night.



“All I know is we’re less than a week away from making a lot of money or getting clobbered,” Nick Bogdanovich, William Hill director of trading, told ESPN.