DUBLIN, Ohio – Phil Mickelson will not play in the U.S. Open.

He will attend his daughter Amanda’s high school graduation instead.

Mickelson told the New York Times before Saturday’s third round of the Memorial at Muirfield Village Golf Club that he informed U.S. Golf Association officials of his decision.

The first round of the U.S. Open at Erin Hills in Wisconsin in June 15. That’s the same day his daughter will graduate in ceremonies at Pacific Ridge School in Carlsbad, Calif.

“As I look back on life, this is a moment I’ll always cherish and be glad I was present,” Mickelson said. “There’s no greater joy as a parent.”

The U.S. Open is the only major championship Mickelson hasn’t won. A victory in the national championship would make him the sixth player to complete the career grand slam.

Mickelson has finished second in the U.S. Open a record six times.

He has played in 26 U.S. Opens.