According to an excerpt from Alan Shipnuck’s forthcoming biography, federal auditors probing Phil Mickelson’s role in an insider trading scam discovered his gambling losses were more than $40 million from 2010 to 2014.

On Thursday, Shipnuck published an excerpt on his “Firepit Collective” website.

During the PGA Championship on May 17, his unofficial biography on Mickelson will be revealed. The defending champion is Phil Mickelson. He has not stated whether or not he will participate.

Mickelson hasn’t been seen in public since the Saudi International final on Feb. 6.

Shipnuck reported stunning comments from Mickelson about his role in Greg Norman’s Saudi-backed golf enterprise a short time thereafter.

Mickelson downplayed Saudi Arabia’s human rights record, citing the assassination of Washington Post reporter Jamal Khashoggi as justification for becoming connected with the Saudis if it meant gaining leverage on the PGA Tour.

In 2016, Mickelson was a relief defendant in the insider trading case that landed well-known gambler Billy Walters in jail. Walters has since been released and has stated that he is working on a book.

Shipnuck stated in the most current article on the $40 million in gambling losses that federal auditors looked into Mickelson’s accounts for four years, from 2010 to 2014.

The source identified by the author had direct access to the papers.

Mickelson’s annual income was reported to be around $48 million in 2012, around the time of the Dean Foods stock sale, which gained him almost $1 million in a week.

Shipnuck also claimed that money was a major factor in his 2017 breakup from longtime caddy Jim “Bones” Mackay.

Mackay departed Mickelson after the Memorial that year due to a number of “simmering complaints,” including hundreds of thousands of dollars in overdue wages, he claimed.

Norman and his Saudi-funded LIV Golf Investments saw Mickelson as a key recruiter.

He told Shipnuck in a November interview — an excerpt of which was published in February — that he recruited three players who paid lawyers to draught the new league’s operating agreement.

Mickelson’s representative stated he has requested a conflicting event release from the PGA Tour in order to compete in the first LIV Golf Invitational series, which will take place June 9-11 outside of London.

Mickelson has got $30 million up front, according to insiders, and must compete in each of the eight events that make up the LIV Golf Invitational series.

The tournaments have a total prize pool of $20 million, with an additional $5 million for team play.

There are no details on who will be playing or how the team component will operate yet.