• Phil Mickelson bet more than $1 billion on sports over a 30-year period, according to legendary sports bettor Billy Walters.
• Walters’ book, “The Gambler,” is set to be released Aug. 22 and is co-authored with longtime investigative journalist Armen Keteyian.
• The extent of Mickelson’s betting was covered in a book excerpt published on the golf site Fire Pit Collective.
• Walters writes in the book that he had a betting partnership with Mickelson for several years, meaning that Walters would supply Mickelson with betting tips that the golf star, a notoriously unsuccessful gambler, would be able to place at high limits that a successful handicapper like Walters could never dream of.

Tagged: Sports