Topline. Texas furniture kingpin Jim McIngvale better known as Mattress Mack  won $75 million on Saturday after his bet that the Houston Astros would win the World Series paid off, taking home what is believed to be the largest payout in legal sports betting history.

Houston furniture magnate Jim "Mattress Mack" McIngvale successfully hedged on his store's promotion, pocketing approximately $75 million in winnings. A sum thought to be the largest recorded win in legal sports betting history.

The unnamed sports fan put together a 50-leg multi with Sportsbet and picked all 50 of his selections correctly to earn a total of $170,330.95.

Mattress Mack Wins $72.66 Million, Biggest Win in Sports Betting History.