Floyd Mayweather Jr. vs. Ricky Hatton

For weeks, odds on the Floyd Mayweather-Conor McGregor kept dropping as bettors relentlessly put their money on the Irishman who holds the UFC lightweight championship belt.

The Super Bowl is annually the biggest betting event of the year in the U.S. This year, though, it may be eclipsed by a boxing match.
Kevin Bradley, the sports book manager of Bovada.lv, said betting on Mayweather-McGregor has been massive already.