Former US Open champion Bryson DeChambeau has withdrawn from the US PGA Championship because of a wrist injury.
DeChambeau missed the cut at the Masters in Augusta last month after struggling with the problem, shooting disappointing rounds of 76 and 80 before opting to undergo surgery.
He had hoped that would leave him sufficient time to recover ahead of the second major of the year, but he has come up just short.
DeChambeau did travel to Southern Hills in Tulsa, and practiced for three days ahead of the tournament.
However, he made the decision on Wednesday that it would be unwise to push himself too much too quickly and opted to drop out instead.
"I didn't think it was going to be the right decision for me to play this week," DeChambeau told the Golf Channel. "For me it was going to be a stretch.
"This week I'm unfortunately not going to play but I want to give someone else a chance who was fully prepared and ready to go out there and be healthy.
"I could play a couple of rounds, but considering I was doing half days and feeling fatigued and tired, four days is a big stretch for me right now.
"Endurance-wise my wrist is just not able to hold up, it's still swollen. I've got to give it more time."
DeChambeau's spot in the competition has been taken by fellow American Denny McCarthy.