Mayweather wins big on Cowboys' triumph?

Floyd Mayweather brags on his Twitter page about winning big from the Cowboys victory over the Giants.

Floyd Mayweather Jr. steadfastly denies the rumor he bet $3 million on Saturday night's Alabama-Michigan game — but the boxing champ flat-out boasted Wednesday night about a big score on another large wager.

In fact, he tweeted his good fortune.

"I bet the Cowboys second half $200,000. This is real. Not a rumor like Michigan," Mayweather tweeted after the Dallas Cowboys beat the New York Giants 24-17 in the NFL season opener, outscoring the Giants 17-14 in the second half.

Mayweather even included a link to an Instagram photo of a betting ticket. The payoff for this $200,000 bet? A cool $181,818.20.

Real or fake? Hey, his nickname IS "Money."