Phil Mickelson allegedly wagered more than $1 billion on sports bets, book says

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Phil Mickelson’s gambling exploits are detailed in a new book set to hit shelves later this month.

Mickelson is alleged to have bet more than $1 billion on various football, basketball and baseball games over the last 30 years and allegedly asked his associate to place a $400,000 wager on the U.S. team to win the Ryder Cup in 2012, according to details in the book called "Gambler: Secrets from a Life at Risk."

Mickelson’s associate at the time, Billy Walters, is the author of the book. An excerpt from it was published in Golf Digest and Fire Pit Collective. Walters, who is believed to be one of the most successful American gamblers ever, writes extensively about his relationship with Mickelson.

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Phil Mickelson on the second day of the LIV Golf Greenbrier at The Old White Course on Aug. 5, 2023, at White Sulphur Springs, West Virginia. (Joe Robbins/Icon Sportswire via Getty Images)

Walters wrote that he and Mickelson had a partnership starting in 2008 that lasted about five years. Walters wrote that Mickelson had two offshore betting accounts at the time that would take "big action." He added that "Lefty’s" betting limits for college football and NFL games were $400,000 per sport.

In one instance, Walters wrote that Mickelson called him about making a bet on the U.S. team for the Ryder Cup. Mickelson was on the squad with Tiger Woods and Bubba Watson and appeared to be confident about the team’s win.

"’Have you lost your f---ing mind?’" Walters says he asked Mickelson. "’Don’t you remember what happened to Pete Rose?’ The former Cincinnati Reds manager was banned from baseball for