DUBLIN, Ohio — Phil Mickelson plans to skip the U.S. Open so he can attend his daughter Amanda’s high school graduation ceremony near their San Diego home.

Mickelson said he has not officially withdrawn from the tournament, which begins June 15 at Erin Hills in Wisconsin, and will wait closer to the event to do so, barring some change that would allow him to play.

“I wanted to make sure they had enough notice to accommodate it,” said Mickelson, who said he called United States Golf Association executive director Mike Davis to inform him of his plans. “So that’s why I’m saying something today, but it doesn’t look good for me playing. But I’m really excited about this moment in our family’s life.”

Amanda, who turns 18 this month, is Mickelson and wife Amy’s oldest child. She will be giving the commencement speech June 15, which is the first day of the U.S. Open.

Mickelson, who turns 47 the day of the second round, said if the tournament were delayed due to weather or if the ceremony were changed — unlikely scenarios, he said — then he’d try to make it from Southern California to Erin Hills.

The five-time major winner who has never won the U.S. Open said he has been aware of the conflict for about six months.

“Back of your head, you’re like, maybe something will change, maybe something will change, but nothing is really [changing], so here we are,” Mickelson said. “She’s very supportive. She’s always been, ‘Dad, I know you love the Open.’ She’s always been very supportive. But it’s one of those things you just show up. You just need to be there. It wasn’t really something that we discussed, because it really wasn’t much of a decision.”

Mickelson said Amanda will be attending Brown University in Providence, Rhode Island.