James Morrison will be turning down a place in next month's US Open if he wins the BMW PGA Championship on Sunday.
Morrison, out in front after a magical second round 64 at Wentworth, is due to become a father for the first time a fortnight on Monday.
The winner of the European Tour's flagship event becomes eligible for the second major of the season in San Francisco on June 14-17, but the 27-year-old said: "I wouldn't go unfortunately - as hard as it would be to turn it down.
"I don't want to think what would happen if I went. Divorce comes to mind."
Morrison played at Pebble Beach two years ago after winning the qualifying event at Walton Heath. That takes place again this coming Monday, but he has not entered.
Former Open champion Paul Lawrie is another who will not be at the Olympic Club.
He was eligible through the world's top 60, but decided not to enter because he does not think it will help his bid for a return to the Ryder Cup side after a gap of 13 years.