Phil Mickelson reportedly bet over $1 billion on sports, with losses of around $100 million, according to a book by Billy Walters.

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Billy Walters, a successful bettor, scolded Mickelson for considering the Ryder Cup bet, citing risks to his reputation.

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Mickelson denied ever betting on the Ryder Cup and emphasized his commitment to maintaining the game's integrity.

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Mickelson's history of sports gambling includes links to money laundering and an alleged mob bookie, though he was not charged.

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In 2022, Mickelson admitted his gambling addiction had become "reckless" and "embarrassing."

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The partnership ended in 2014 amid federal investigations into stock trades made by both Walters and Mickelson.

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Walters was convicted of conspiracy, securities fraud, and wire fraud, with his sentence later commuted by President Trump.

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