The six-time Major winner will be in the field of 48 at the controversial new tour’s inaugural event in London this week.
“I am ready to come back to play the game I love but after 32 years this new path is a fresh start,” Mickelson wrote in a statement posted on Twitter.
Mickelson has not played since the publication of comments in February in which he criticised the PGA Tour and the Saudi backers of LIV Golf.
In an interview with author Alan Shipnuck, the 51-year-old American left-hander said the Saudi-funded LIV Golf was an opportunity to gain leverage over the PGA Tour.
However, Mickelson described the new venture’s backers as “scary” with a “horrible record on human rights”.
Mickelson, a 45-time winner on the PGA Tour, later issued an apology after his remarks were made public and said he would take some “desperately needed time away” from the sport.
He subsequently skipped both the Masters and the US PGA Championship during his self-imposed exile.
“Taking time away and self-reflecting has been very humbling,” Mickelson said.
“I’ve been engaged and intentional in continued therapy and feel healthy and much more at peace. I realise I still have a long way to go but I am embracing the work ahead.”
During his absence, however, the rise of LIV Golf has continued to tear at the fabric of world golf, with dozens of household names joining the new tour.
Last week, former world No 1 Dustin Johnson was confirmed as having signed up to play the money-spinning new series, whose tournaments will offer some of the richest purses in the history of golf.
This week’s event teeing off at Centurion Club at St Albans, north of London, will have a US$25 million purse – almost double that of any major, with US$4 million going to the winner.
The Washington Post reported yesterday that LIV Golf commissioner Greg Norman said 15-time Major winner Tiger Woods turned down a “mind-blowingly enormous” overture by LIV.
“We’re talking about high nine digits,” said Norman.
Woods said at last month’s PGA Championship he believed in the legacy of the US PGA Tour, citing its development by such icons as Jack Nicklaus and Arnold Palmer.
Along with Mickelson and Johnson, other players include European Ryder Cup stars Ian Poulter, Lee Westwood and Sergio Garcia.
Players opting into LIV Golf have done so despite warnings from the PGA Tour that they will face disciplinary action.
‘Grateful to have him’
Several PGA Tour golfers had requested releases to play this week’s LIV event, which clashes with the PGA Tour’s RBC Canadian Open, but had been refused.
“I also intend to play the Majors,” Mickelson said, potentially putting him on a collision course with the PGA and the R&A.
US Golf Association chief executive officer Mike Whan told The Golf Channel no decision has been made about qualified LIV Golf players taking part in next week’s US Open in suburban Boston, Mickelson being among several who have qualified.
Mickelson said he believed LIV Golf could have a “transformative” effect on the sport.
He also said it would allow him to change his lifestyle.
“It will provide balance, allowing me to focus on a healthier approach to life on and off the course,” Mickelson said.
“I am incredibly grateful for what this game and the PGA Tour has given me.”
However, Mickelson added, “I fully realise and respect some may disagree with this decision and have strong opinions and I empathise with that.”
“I have a renewed spirit and excitement for the game.”
Mickelson, who became the oldest Major winner at age 50 by capturing the 2021 PGA Championship at Kiawah Island, won 45 career US PGA Tour titles and was inducted into the World Golf Hall of Fame in 2012.
“Phil Mickelson is unequivocally one of the greatest golfers of this generation,” Norman said.
“His contributions to the sport and connection to fans around the globe cannot be overstated and we are grateful to have him.”