John Daly withdrew from the U.S. Senior Open on Monday, citing a knee injury and claiming the United States Golf Association wouldn’t allow him to use a cart.Daly said he is plagued by osteoarthritis in his right knee and unable to walk The Broadmoor course in Colorado Springs, Colo. The tournament begins Thursday.He revealed the situation on his Twitter account.”Unfortunately–I had to WD from the US SENIOR OPEN. The deteriorating osteoarthritis isn’t helping my rt knee. I fall under the @ADANational but @USGA turned down a cart for me this week. Just going to give the knee a rest. Don’t know what’s ahead for me.”The USGA responded with a statement through its own Twitter account, saying Daly didn’t meet the guidelines of the American Disabilities Act (ADA).”His submission did not support a waiver of the walking condition. We offered Mr. Daly the opportunity to provide additional information to support his request for a cart. He informed us this morning that he decided to withdraw,” the USGA wrote.Daly, 52, said his lawyers informed him he is eligible to use a cart under the ADA. The USGA disagrees and said Daly’s injury isn’t severe enough to grant him a cart.