After allegedly losing $3 million on a college football game, Floyd Mayweather made some money back on the 2012 NFL season opener.

The boxer made a $200,000 bet on the Dallas Cowboys, as the beat the New York Giants at MetLife Stadium on Wednesday. The wager netted Mayweather $181,818.20. He took the Cowboys in the cond half. They were 1.5-point underdogs heading into the second half.

While Mayweather denied reports that he lost $3 million on Michigan's loss to Alabama on Saturday, the boxer showed proof of his victory on Wednesday. He sent out a picture of his winning ticket on Instagram.

Mayweather has become known for gambling on sports, and often shows pictures of his winning tickets on Twitter. He sent the picture of his winning ticket in response to the reports that he lost $3 million over the weekend.

"I bet the Cowboys second half $200,000. This is real. Not a rumor like Michigan," he tweeted.

He can certainly afford to make his lofty bets. Mayweather reportedly earned more money last year than any athlete in the world. According to Forbes, he made $85 million from June 2011 to June 2012.

The Cowboys took a 7-3 lead into the third quarter. Dallas needed to win the game by at least two points in order for Mayweather to win the bet, and came out on top 24-17.

Dallas began the game as 3.5-point underdogs to the Giants.