The Kansas City Chiefs quarter-back was at Churchill Downes with wife Brittany taking in the 149th edition of the iconic race.
He was one of hundreds of celebrities who headed to the Kentucky course, and was spotted on the red carpet.
That’s where he was caught in conversation with mattress king Jim McIngvale, a huge gambler.
The billionaire 72-year-old told the Super Bowl MVP he had lost millions betting against him during games.
The Texan said: “You cost me millions betting against you.”
Mahomes replied: “You gotta be with me next time”, according to Bleacher Report.
Mack once bet a staggering $4.5million on the Cincinnati Bengals winning the Super Bowl in 2022.
They lost that match to the Los Angeles Rams, costing him a fortune.
He also lost $1m on the San Francisco 49ers during the 2020 Super Bowl.
However, the furniture mogul did win a staggering $72million on the Houston Astros winning the 2022 World Series.
Mack had wagered a mega $10m on bets across multiple sportsbooks on them doing so.