Six-time major champion Phil Mickelson will play at this week’s opening event of the LIV Golf Invitational Series after a four-month break from the game.
Mickelson has not played since controversial comments about the Saudi-funded breakaway series were published by his biographer in February.
The American has now been added to the field at Centurion Club in St Albans.
The 51-year-old had sought a release from the PGA Tour to play in the first event of the Greg Norman-led series.
However the PGA Tour has said players taking part in the event could face sanctions.
In a statement on Twitter, Mickelson said taking time away from the sport has been “humbling”.
Mickelson lost multiple sponsors and saw his reputation tarnished after he criticised the Saudi regime, yet sought to use involvement with the Saudi Arabia-backed golf super league to gain leverage over the PGA Tour.
He subsequently missed the Masters for the first time in 28 years as well as last month’s US PGA Championship, where he was defending champion.
“First and foremost, I want to again apologise to the many people I offended and hurt with my comments a few months ago,” he said.
“I have made mistakes in my career in some of the things I have said and done. Taking time away and self-reflecting has been very humbling.”
Having missed the last two majors, Mickleson says he intends to continue playing in the biggest tournaments.
He added: “I am thrilled to begin with LIV golf and I appreciate everyone involved. I also intend to play the majors.
“I fully realise and respect some may disagree with this decision and have strong opinions and I empathise with that.
“I am ready to come back to play the game I love but after 32 years this new path is a fresh start, one that is exciting for me at this stage of my career and is clearly transformative, not just for myself, but ideally for the game and my peers.”
The LIV Golf International Series is regarded as the first incarnation of the proposed breakaway Super League.
Mickelson has reportedly accepted a package worth £24m to compete in the eight-tournament series. He is joined by players such as two-time major winner Dustin Johnson, England’s former world number one Lee Westwood, Ian Poulter and Spaniard Sergio Garcia.
Norman has shelved plans to run the series as a league format, instead each event will run as an invitational tournament until 2024.
“Phil Mickelson is unequivocally one of the greatest golfers of this generation,” said Norman. “His contributions to the sport and connection to fans around the globe cannot be overstated and we are grateful to have him.
“He strengthens an exciting field for London where we’re proud to launch a new era for golf.”