Reed became the youngest winner of a World Golf Championship, his third win in his last 14 tournaments.
Woods, only three shots behind going into the final round in his best chance this year to win a tournament, said his back flared up after an awkward shot out of the bunker on the sixth hole. He failed to make a birdie in the final round for the first time in his PGA Tour career, and his 78 was his worst Sunday score ever.
Reed is expected to go to No. 20 in the world ranking. In his own ranking, he feels he belongs in the top five. He cited an amateur career that includes going 6-0 in matches to lead Augusta State to two NCAA titles, followed by three PGA Tour wins in seven months.
“I don’t see a lot of guys that have done that besides Tiger Woods and the legends of the game,” Reed said. “I believe in myself, especially with how hard I’ve worked. I’m one of the top five players in the world. I feel like I’ve proven myself.”
He joined some exclusive company. Since 1990, only Woods, Phil Mickelson, Rory McIlroy and Sergio Garcia had three PGA Tour wins before turning 24.
Watson, who won at Riviera three weeks ago, went bogey-free over the final 27 holes, a strong performance on the overhauled Trump National Doral. He closed with a 68. Donaldson had a 70.