Phil Mickelson to return for first Saudi-backed LIV Golf Invitational Series event

June 6 (UPI) -- After a four-month hiatus, six-time major championship winner Phil Mickelson is set to make his return to competitive golf this week on the Saudi-backed LIV Golf Invitational Series.

Mickelson was added to the field Monday for LIV Golf's first tournament, which is scheduled to begin Thursday at Centurion Club outside London.

In a statement posted to his official Twitter account Monday, Mickelson said he still plans to compete in the four major championships moving forward. He didn't say whether he would compete in other PGA Tour events.

Mickelson told Sports Illustrated on Monday that he expects to play in this month's U.S. Open, which starts June 16 at The Country Club in Brookline, Mass.

Dustin Johnson leads field for first Saudi-backed LIV Golf series event