Mayweather wins big on Cowboys’ triumph?

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.”