Jim Furyk was forced out of the opening round of the BMW Championships on Thursday due to a wrist injury.
The American was one over par through six holes before he walked off the Conway Farms course due to the pain in his wrist.
The injury comes at an inopportune time for the world number seven; as Furyk is at the business end of the FedEx Cup playoffs, where $10 million is up for grabs.
After this weekend, there is just the Tour Championship, which is the final instalment of the series . However, the former US Open winner also has the President's Cup in South Korea to think about.
"I'm very concerned," the 45-year-old told clubcall.com.
"I would like to be ready for both of them, and if I can't get ready for next week, I would like to get ready for the Presidents Cup.
"But also I want to play with a chance to compete, and right now being out here I have no chance to compete this week with the pain I was feeling and with what I had shot-wise.
"I'm in pain out there and I'm not near 100 per cent. I don't know if flinching is the right word, but I'm having a hard time getting through the ball on the ground right now."
Despite just one win in 2015, Furyk is having another consistent season, with seven top ten fishes. The 17-time PGA Tour winner has missed just two cuts in two years.
Scotland’s Connor Syme and Englishman Matthew Jordan were also part of the successful quintet.
The English Open has been revived as part of the new schedule.
Close House Golf Club, near Newcastle, will host the British Masters on July 22.
The event was last staged in 2002.
The tournament at Close House, scheduled to start on July 30, is set to be the first European Tour event since the coronavirus crisis halted action.
The world number one believes it would be the ‘right call’ to push the event back to 2021.
The exhibition match, against Phil Mickelson and Tom Brady, raised 20 million dollars.
The Dutchman finished third and second in the first two weeks of the home-based competition.
NFL stars Tom Brady and Peyton Manning will also be involved.
The US President was among the viewers watching the TaylorMade Driving Relief.