Jim "Mattress Mack" McIngvale is really swinging for the fences in Super Bowl LVI. The Houston-area mattress salesman has placed a $5 million wager on the Cincinnati Bengals moneyline with Caesars Sportsbook -- the largest bet any legal sportsbook has ever taken. So what's the second largest bet Caesars Sportsbook specifically has ever taken? A prior, $4.5 million wager from McIngvale on the Bengals to win the Super Bowl.

If the Bengals defeat the Los Angeles Rams, McIngvale, who has $9.5 million on the line, would receive a total payout of $16.2 million on both of his Super Bowl wagers. The moneyline odds for the Bengals to win was at +170 when McIngvale placed both wagers.

The most recent $5 million wager is largest single sports bet ever place through a legal sportsbook. The previous record was a $4.9 million bet on the St. Louis Rams to beat the New England Patriots in Super Bowl XXXVI, according to KSNV.

According to Caesars, "Mattress Mack" traveled to Louisiana in order to place his lofty wager. Sports betting recently went live in the state just two weeks ago. He also placed the initial "smaller" ($4.5 million) wager on his mobile betting account with Caesars Sportsbook when he crossed the Texas border into Louisiana.

"Mattress Mack" has had a lengthy track record when it comes to betting on some of the biggest events in sports. During the 2021 MLB season, McIngvale bet an estimated $13 million in multiple wagers on the Houston Astros to win the World Series and offered his traditional refund to any customer that spent at least $3,000 at his furniture store.

On Sunday, quarterback Joe Burrow will be looking to win the first Super Bowl in Bengals history. It also marks the first time that Cincinnati has reached the Super Bowl since 1988.