John Daly has reportedly vowed he'll never play in another US Senior Open a day after officials declined to immediately grant him permission to use a cart at this week's championship in Colorado.
The two-times major champion applied for an exemption to use the vehicle due to a persistent knee injury that, he says, makes walking difficult.
The US Golf Association (USGA) said it had asked Daly for more supporting evidence to justify needing a cart but that the golfer had withdrawn from the event.
"Just not worth it to me," the 52-year-old American told USA Today on Tuesday, saying he was "done" with playing any event run by the USGA.
The US Senior Open starts on Thursday in the rarefied air of Broadmoor Golf Club at the foot of the Rocky Mountains in Colorado Springs.
Kenny Perry is the defending champion.