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NFL Memo Reminds Teams of Prohibited Prop Bets Amid Rising Gambling Scrutiny

The NFL reinforced rules on four types of banned proposition bets to protect game integrity after gambling scandals hit MLB and NBA, with 98% of legal sportsbooks complying.

  • On Thursday, the National Football League sent a league-wide memo reminding teams and players about proposition bets and the steps taken to protect game integrity.
  • Following high-profile scandals in the NBA and MLB, federal investigations and charges—including arrests tied to NBA game-rigging and indictments of Cleveland Guardians pitchers Emmanuel Clase and Luis L. Ortiz—intensified scrutiny.
  • The memo breaks down prohibited wagers into four categories: inherently objectionable, officiating-related, determinable by one person in one play, and pre-determined, with examples like a kicker to miss while allowing single-player cumulative stat bets.
  • The memo is unlikely to change sportsbook offerings, while the league said legal sportsbooks in the United States generally avoided banned markets and no player has been suspended since 2023.
  • The memo specifically bars prediction markets such as Kalshi and Polymarket, and the NFL said it aims to curb illegal activity and protect integrity though timing is unclear.
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The NFL will ban a series of bets and avoid scandals similar to those in the MLB this year

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Bias Distribution

  • 46% of the sources lean Left
46% Left

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The Record broke the news in Waterloo, Canada on Thursday, November 13, 2025.
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