Just like the U.S. Open, this one was never seriously in doubt.
McIlroy seized control with back-to-back birdies Sunday morning to complete the storm-delayed third round with a 67 and build a three-shot lead. No one got closer than two shots the rest of the way, and McIlroy closed out a remarkable week by playing bogey-free over the final 23 holes on the Ocean Course.
David Lynn, a 38-year-old from England who was playing in America for the first time, won the B-flight. He closed with a 68 and was the runner-up.
Woods, who shared the 36-hole lead for the second time this year in a major, was never a serious factor. He tossed away his chances Saturday before the storm blew in and never could get closer than four shots. He closed with a 72, failing to break par on the weekend in any of the four majors for the first time in his career.
If there was a signature shot for McIlroy at Kiawah Island, it might have been Saturday when his tee shot lodged into a tree on the third hole. He found it only with help from the TV crew, took his penalty shot and fired a wedge into 6 feet to save par. He was on his way, and he never let up.
McIlroy also won the U.S. Open by eight shots, the kind of dominance that Woods has displayed over so many years.
"It was a great round of golf. I'm speechless," said McIlroy after hoisting the Wanamaker Trophy, the heaviest of the four majors. "It's just been incredible. I had a good feeling about it at the start. I never imagined to do this."
Ian Poulter, who started the final round six shots behind, made six birdies through seven holes to get within two shots. He made three straight bogeys on the back nine and had to settle for a 69. He tied for third at 4-under 284, along with Justin Rose (66) and defending champion Keegan Bradley (68).