The New Jersey Division of Gaming Enforcement discovered the issue, which occurred during the Cleveland Browns vs. Kansas City Chiefs playoff game in January 2021. BetMGM.com was fined $500 by the organisation for failing to correctly show the odds on a betting market.

The miscalculation involves a player prop wager on the performance of the two quarterbacks, Patrick Mahomes of Kansas City and Baker Mayfield of Cleveland. BetMGM planned to provide wagers on whether each quarterback would throw for 300 yards or more throughout the game, however a human error resulted in the "3" being omitted, leaving gamblers with the option of betting on whether the players would pass for 00 yards or more.

If each player had completed only one throw for one yard, the bet would have won. The two combined for 459 passing yards, thus the wager was a winner, with five BetMGM clients, as well as four at Borgata Online, which is owned by MGM Resorts International, detecting the error.

According to state filings, MGM submitted the inaccuracy to the gaming enforcement division in an attempt to have the bets nullified because the odds were calculated incorrectly.

However, following an examination, the state determined that the bets could not be annulled. However, the operator soon decided to let the bets remain and pay the winners.