Tiger Woods crashed his SUV on a sweeping, downhill road in the Los Angeles suburbs on Tuesday morning, and doctors have tried to stabilise "significant" injuries to his right leg with rods and a combination of screws and pins.
Woods was driving to a television shoot when his SUV crashed into a median, rolled over and ended up on its side near a steep road known for wrecks, authorities said.
Golf's biggest star had to be pulled out through the windshield.
Woods' foundation said in a statement he was awake, responsive and recovering in the hospital.
Dr Anish Mahajan, the chief medical officer at Harbor-UCLA Medical Centre, said Woods had shattered the tibia and fibula bones of his lower right leg in multiple locations.
Those injuries were stabilised with a rod in the tibia. Additional injuries to the bones in the foot and ankle required screws and pins, Mahajan said in a statement released on Woods' Twitter account late Tuesday night.
The lengthy surgery also reduced swelling.
A resident near the accident site called 911. A Los Angeles County sheriff's deputy, the first on the scene, poked his head through a hole in the windshield to see Woods, his seatbelt fastened, sitting in the driver's seat.
The single-car crash was another setback for Woods, the preeminent golfer of his generation who has spent the last decade in a cycle of injuries, self-inflicted personal problems and an arrest for DUI. Each time, he returned to the course and won.
Even at 45, Woods is among the more recognisable sports figures in the world and remains golf's biggest draw.
His 2019 Masters victory was seen as a transcendent comeback and further cemented his reputation for toughness and clutch performances.
Briefly Tuesday, the world paused and worried that Woods might be critically injured or worse. As it became clear his life wasn't in danger, the obvious question came out: Can he play golf again?
"As if his body hasn't endured enough," Jon Rahm, the No. 2 player in the world, said from the Workday Championship in Florida. "I just hope he can get out of the hospital after recovery and he can still play with his kids and have a normal life."
No charges were filed, police said there was no evidence he was impaired and no one else was injured.
It was the 10th surgery for Woods, who has suffered knee, back and neck problems for more than a decade.
Woods was in Los Angeles over the weekend as tournament host of the Genesis Invitational that ended Sunday, and then to film content for his sponsor, Discovery-owned GOLFTV. He was not playing while recovering from a fifth back surgery on December 23.
Woods was alone in the SUV when it crashed into a raised median, crossed two oncoming lanes and rolled several times. Police said Woods was alert as firefighters pried open the front windshield to get him out.
Los Angeles County Sheriff Alex Villanueva said the airbags deployed and the inside of the SUV stayed mostly intact, which "gave him a cushion to survive the crash."
Authorities said they had checked for any odour of alcohol or other signs he was under the influence of a substance and found none. They didn't say how fast he was driving.
The crash happened about 7.15 am on a downhill stretch of a two-lane road through upscale suburbs.
Gonzalez, the first to get to the wreck, said: "I will say that it's very fortunate that Woods was able to come out of this alive."
Thoughts and prayers have come from everywhere - Jack Nicklaus and Michael Jordan, Mike Tyson and former Presidents Barack Obama and Donald Trump, who has played golf with Woods and awarded him the Presidential Medal of Freedom in 2019.
Woods shares with Sam Snead the PGA Tour record of 82 career victories.
Australian Associated Press