Koepka has work done on left knee in offseason

LAS VEGAS (AP) >> Brooks Koepka spent the majority of his short offseason recovering from stem cell treatment on his left knee.

Koepka returns to competition this week in the Shriners Hospitals for Children Open, giving Las Vegas the No. 1 player in the world for the first time since Greg Norman in 1988 when the tournament was played in the spring.

He said after his pro-am round Wednesday that he had the stem cell treatment on his patella on Aug. 25, the day after the PGA Tour season ended at the Tour Championship. He said he was limping for a few days because the treatment was painful, but he was excited about finally feeling whole.

The treatment followed a year in which Koepka won three times, including the PGA Championship for his fourth major and his first World Golf Championships title.

“My knee was bugging me from

about March on,” Koepka said, adding that the final four months were a “struggle.”

That makes him the third player from the top 10 in the world to have work done on his knee during the offseason, joining Dustin Johnson and Tiger Woods. None was too serious, as Woods plans to return in three weeks at the new tournament in Japan. Johnson is likely to return at the Hero World Challenge in the Bahamas the first week of December, followed by the Presidents Cup in Australia.

Koepka never talked about injury during the season. He said his knee made it difficult to walk down hills and that it kept him from practicing. He returned to practice a little over a week ago and feels this is the most prepared he has felt going into a tournament in some time.

With all that, he still managed to have the three victories, lead the PGA Tour money list and join Jack Nicklaus, Tiger Woods and Jordan Spieth as the only players to finish among the top four in every major. Koepka was runner-up at the Masters and U.S. Open.