"Phil currently has no concrete plans on when and where he will play," Mickelson's long-time manager, Steve Loy of Sportfive, said in a statement.

"Any actions taken are in no way a reflection of a final decision made, but rather to keep all options open."

Monday was the deadline for players to ask for a conflicting event release from the PGA Tour to play in the inaugural LIV Golf Invitational on June 9-11 in England.

It also was the deadline to register for the PGA Championship, to be played May 19-22 at Southern Hills.

Mickelson is exempt as the defending champion, winning at Kiawah Island last year at age 50 to become the oldest major champion.

"Phil currently has no concrete plans on when and where he will play." - Steve Loy.

That also gave him a five-year exemption to the U.S. Open, which this year will be played outside Boston on June 16-19.

It was the first word from the Mickelson camp since February 22, when he apologised for explosive remarks in a book excerpt by Alan Shipnuck in which he disparaged the Saudis behind Greg Norman's attempt at a rival league and said he wanted leverage against the "obnoxious greed" of the PGA Tour.

Mickelson has not played since the Saudi International on February 6, even skipping The Masters.

Norman has said the rival league he envisioned will be put on hold until 2024.

Instead, he said players could sign up for any of the eight tournaments for his LIV Golf Invitational series, which offer $20 million in prize money with an additional $5 million purse for the team aspect.

The inaugural LIV event is June 9-11 at Centurion Club, outside London.

Robert Garrigus, who is No.1,053 in the world, is among those who have asked for a release with hopes of playing.

While those releases may be reluctantly granted, several future LIV Golf events are scheduled for the United States and PGA Tour bye-laws state that its members cannot play in a conflicting event in North America.

The season-ending LIV Golf team championship, in which 12 four-man teams compete for a $50 million purse, is scheduled for October 27-30 at former PGA Tour stop Trump National Doral Miami.