Floyd Mayweather 'bet $5.9 MILLION on Miami Heat winning... and won up to $6.5 million profit' Boxing extraordinaire Mayweather reportedly put down the bet on last night's Game 7 between the Indiana Pacers and the Heat The Miami Heat beat the Indiana Pacers 99-76 in Miami

Big bucks: Floyd Mayweather Jr., pictured left at a previous Miami Heat game and right boxing, reportedly put down a $5.9 million bet on Miami Heat to win last night's game and they did

Mayweather apparently made the eye-boggling bet just after he signed a six-fight $200 million with Showtime and agreed to fight Canelo Alvarez in September for some $40 million.

The sports star is no stranger to gambling, and winning, but even for him the almost $6 million wager is extreme.

Vegas Gambling Steam broke the news of the eye-boggling bet on Twitter.

'Good source from my #HeavyHitters Vegas crew alerted me that Floyd Mayweather has laid over $5,900,000 on Heat -7 tonight in Vegas,' the tweet read.

Winners: Miami Heat forward Chris Andersen, center, raises the NBA Eastern Conference trophy after defeating the Indiana Pacers 99-76 in game 7 in their NBA basketball Eastern Conference finals playoff series

Making Mayweather money: LeBron James, right, of the Miami Heat drives against the Indiana Pacers' Paul George in the game they won

Boxer: Mayweather apparently made the eye-boggling bet for Miami Heat to win just after he signed a six-fight $200 million with Showtime and agreed to fight Canelo Alvarez in September for some $40 million

Squirt: David Beckham shakes hands with Miami Heat small forward LeBron James, left, during the second half of Game 7 in their NBA basketball Eastern Conference finals playoff series

Star spectators: Justin Bieber, center, was also cheering on the Heat in the Indiana Pacers vs Miami Heat game last night

Finals: Miami Heat point guard Mario Chalmers, right, and Miami Heat shooting guard Dwyane Wade, left, walk down the court during the second half of Game 7

'This is kind of ridiculous. C'mon Floyd,' Benjamin Lee Eckstein of AmericasLine.com, a nationally-syndicated odds column, told the New York Daily News.

'I know that there have been people who walked into a casino and bet a million dollars, but not on basketball. It was always the Super Bowl.'

According to Vegas Gambling Steam, Mayweather had to spread his wagers across nine sportsbooks.

Big game: Mayweather was cheering on the Heat who destroyed their competition with the help of LeBron James

Baby: Miami Heat's Ray Allen, left, holds the NBA Eastern Conference trophy as Chris Bosh hold his son Jackson and Dwyane Wade and LeBron James smile, Monday, June 3, 2013, in Miami

Smiles: Miami Heat forward LeBron James smiles during the post game news conference after defeating the Indiana Pacers

Celebrations: Miami Heat LeBron James, left, Chris Andersen and Dwyane Wade, right, celebrate after defeating the Indiana Pacers in Game 7 in their NBA basketball Eastern Conference finals playoff series, Monday, June 3, 2013

Spurs: The Heat will face the San Antonio Spurs in the NBA Finals

Salute: Miami Heat forward LeBron James, acknowledges the crowd after accepting the Eastern Conference Finals trophy after defeating the Indiana Pacers following their NBA playoff basketball game at the American Airlines Arena in Miami, Florida

'I don't think that anybody's taking a six million dollar bet at one shot,' Eckstein said. 'You'd probably have to call (Vegas mogul) Steve Wynn personally for that.'

Mayweather enjoys sharing his winning and losing tickets on Twitter, but he's yet to brag about picking the victorious team last night.

Between August 2010 and and February 2012, Mayweather had a nearly flawless run, tweeting photographs of 46 betting slips, totaling $3,890,833 worth of bets, and 'every single one of them was a winner, netting the fighter a cool $3,938,722 in winnings,' according to a story on Grantland.com.