Bryson DeChambeau described himself as "desperately disappointed" after a positive test for COVID-19 ruled him out of competing in the golf competition at Tokyo 2020.
A statement from the PGA Tour confirmed the 2020 US Open champion failed the final testing protocol before heading out to the Japanese capital to represent Team USA.
In his place comes Patrick Reed, who is undergoing testing on Sunday and Monday before departing for Japan.
Should he clear that hurdle Reed will become a two-time Olympian having also competed at Rio 2016. He joins Justin Thomas, Open Championship winner Collin Morikawa and Xander Schauffele as part of a star-studded USA line-up in the men's event.
"I am deeply disappointed not to be able to compete in the Olympics for Team USA," said DeChambeau.
"Representing my country means the world to me and it is was a tremendous honour to make this team.
"I wish Team USA the best of luck next week in Tokyo. I will now focus on getting healthy, and I look forward to returning to competition once I am cleared to do so."
Reed added: "I am so excited to have the opportunity to represent our country and be a part of Team USA in Tokyo.
"I wish Bryson nothing but the best, and I know how disappointed he is to not be able to compete, and I will do my best to play my best and represent our country."
Scheffler swinging with confidence at Tour Championship despite seeing lead cut to four
Scottie Scheffler insists his swing is "in a good spot" despite seeing his lead at the top of the Tour Championship standings cut to four shots on the second day.
Scheffler, who is aiming to win his first FedEx Cup title, carded 65 in his opening round and entered the second round with a 10-shot lead.
However, the world number one saw American duo Collin Morikawa and Xander Schauffele close the gap during a weather-disrupted second round on Friday.
Scheffler carded a round of 66 to take himself to 21 under par, aided by two birdies in the final three holes to keep the chasing back at bay.
"I feel like my swing is in a good spot, and I've hit it nice the last couple of days," he said. "A lot of quality stuff out there, and in a good spot going into the weekend."
Morikawa is four shots off the pace after producing a superb eight-under 63, which was the best round of the day, and has surged up the standings to second place.
In an impressive round, he dropped just one shot on the 11th hole, but made amends on the back nine before closing with back-to-back birdies.
"He's going to continue to make birdies," Morikawa said about the possibility of catching Scheffler. "He's driving it really, really well here, and you're giving yourself enough wedges to make some scoring opportunities out there.
"For me, it's just about bringing energy and just staying alive out there."
Schauffele is in third, one shot behind compatriot Morikawa, after shooting an impressive second-round 64 to remain in the hunt for the $25million prize money.
There is then a four-shot gap until a group of three players, including Adam Scott, are tied for fourth place at 12 under, while Rory McIlroy is tied for 10th place on eight under.
'Still feel like I've got a chance', says McIlroy as Scheffler takes Tour Championship lead
Scottie Scheffler is in prime position to win his first FedEx Cup title after storming into a seven-shot lead at the Tour Championship.
The world number one, who started on 10 under due to the FedEx Cup's staggered structure, carded a superb 65 in the first round of the PGA Tour's season-ending tournament, after recovering from an early bogey at East Lake.
Scheffler's haul included seven birdies, with five of those coming from his last seven holes, as he bids to win a seventh PGA Tour event of the season.
His main FedEx Cup challenger Xander Schauffele is tied for second on nine under par, along with Collin Morikawa, while Rory McIlroy is three shots back in T10.
However, the Northern Irishman has not given up hope of applying pressure to Scheffler as the tournament goes on.
"I'm happy with how I hung in there and had a good finish," McIlroy told Sky Sports.
"When I saw Scottie had gotten to 14, I was like, 'Oh, got to try to just hang on to the coattails a little bit'.
"Still feel like I've got a chance, and it was nice to finish the way I did."
Scheffler, also speaking to Sky Sports, said: "Yeah, I'm pleased with the day.
"I tried not to think about any sort of lead or anything like that, my job was to go out there and execute and I felt like I did a really good job of that. I felt like I was doing some good stuff to start the day.
"I had the bogey on one but after that I felt like I played some really good golf."
Bradley in disbelief after moving into FedEx Cup contention with BMW Championship win
Keegan Bradley was in disbelief after putting himself in FedEx Cup contention by winning his second BMW Championship title on Sunday.
Bradley, who was appointed as the United States' 2025 Ryder Cup captain last month, edged out Adam Scott to claim a one-shot victory at the event near Denver.
Scott pulled level with Bradley at the start of his final round but later bogeyed three straight holes as the American won his seventh PGA Tour title.
Bradley, who also won the 2018 tournament by beating Justin Rose in a play-off, now sits fourth in the FedEx Cup standings, behind Scottie Scheffler, Xander Schauffele and Hideki Matsuyama.
Following his victory, the 38-year-old set his sights on another triumph at next week's Tour Championship in Atlanta, having only just squeezed into the 50-player field at Castle Pines.
"Oh, man, it just shows why you've got to grind it out every week because you never know how fast it can switch," Bradley said.
"Now I go to Atlanta with a chance to win the FedEx Cup. I can't believe it. I'm so excited.
"I'm in a bit of a state of shock because there was a time a week ago about this time that I didn't think I was going to be coming here.
"I had to have a lot of magical things happen for me to just play in this tournament, and when I got here, I was so grateful just to be here.
"I played with a real sense of calm all week, which is not the norm for me"
SportsMax is the Caribbean sports channel of choice, committed to providing sporting content of the highest quality to the Caribbean, delivered by a team of highly innovative, passionate and qualified professionals.
(876) 619-7629
digitalmedia@sportsmax.tv
