KIAWAH ISLAND, S.C. -- Rory McIlroy dressed the part as golf's next star and played like it, too.
Saving his bright red shirt for Sunday in the PGA Championship, McIlroy never gave anyone much of a chance. Two exquisite shots with the wedge set up back-to-back birdies to seize control of the final round. He never made a bogey over the final 23 holes of his marathon day.
McIlroy validated his eight-shot win at the U.S. Open last year by blowing away the field at Kiawah Island, making the 23-year-old from Northern Ireland the youngest player since Seve Ballesteros to win two majors. Tiger Woods was about four months older than McIlroy when he won his second major.
"I think I heard Tiger say, 'You can have a good season, but to make a good season a great season, you need a major championship,' " said McIlroy, who returned to No. 1 in the world. "Now I've had two great seasons in a row no matter what happens from here in now."
Standing on the 18th tee with a seven-shot lead, McIlroy turned to caddie J.P. Fitzgerald and said, "I'm going to win this one by eight, as well."
He then rolled in a 25-foot birdie putt for a 13-under 275 total.
McIlroy shattered the scoring record at the Open. He broke Jack Nicklaus' record for margin of victory in the PGA Championship.
He took the lead for good Sunday morning with back-to-back birdies on the back nine to finish a rain-delayed third round at 67 for a three-shot lead. No
David Lynn, a 38-year-old from England who was playing in the United States for the first time, won the B-flight. He closed with a 68 and was 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.
"I came out with probably the wrong attitude yesterday," said Woods, who finished at 2-under 286. "And I was too relaxed, and tried to enjoy it, and that's not how I play. I play intense and full systems go. That cost me."
McIlroy was 13 shots better than Woods over the last two rounds.
"It was a great round of golf. I'm speechless," McIlroy said after hoisting the Wanamaker Trophy. "It's just been incredible. I had a good feeling about it at the start. I never imagined to do this."
Winning the final major the year ends what had been a tumultuous season for McIlroy. Despite winning the Honda Classic in March and going to No. 1 for the first time in his career, he went into a tailspin by missing four cuts over five tournaments as questions swirled that his romance with tennis star Caroline Wozniacki was hurting his game.
Instead, McIlroy put a big hurt on the strongest field of the year.
"I was a little frustrated with how I was playing earlier on in the year, but a few people in this room were probably pushing panic buttons for no reason," McIlroy said. "It's just great to be able to put my name on another major championship trophy."
Woods predicted greatness for McIlroy when he first came to America at 19.
"We all know the talent he has," Woods said. "He went through a little spell this year, and I think that was good for him. We all go through those spells in our careers. He's got all the talent in the world. And this is the way Rory can play. When he gets it going, it's pretty impressive to watch."
Ian Poulter put up the stiffest challenge, though not for long. Poulter, who began 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), defending champion Keegan Bradley (68) and Carl Pettersson (72).
Pettersson tried to put up a good fight, though he suffered a setback on the first hole without even realizing it.
The Swede drove just inside a red hazard line. He checked to make sure his club could touch the grass without grounding the club.
That part was fine. However, PGA rules officials determined after scrutinizing a video replay that a small leaf moved as Pettersson took back the club. That violates Rule 13-4c -- moving a loose impediment while in a hazard -- and three holes later he was informed it was a two-shot penalty. The par became a double bogey.
Pettersson responded with back-to-back birdies. By then, it was too late for Pettersson, really too late for anybody.
"I've got to take it on the chin, obviously, but it's one of those stupid rules," Pettersson said.
McIlroy was tied for the lead with Vijay Singh when they returned Sunday morning. Twenty-seven holes later, McIlroy had no peer in the final major of the year.
As for the shirt? McIlroy was planning to wear red during the final round but only if he wasn't playing with Woods.
"Might have to do it from now on," McIlroy said. "No wonder he wins so much."
McIlroy's win ends a streak of the last 16 majors going to 16 different winners. He joined Woods, Padraig Harrington and Phil Mickelson as the only players to win majors in consecutive years over the last two decades.
McIlroy is also the sixth-youngest player to win two majors. The others were Young Tom Morris, John McDermott, Gene Sarazen, Nicklaus and Ballesteros.
Rory McIlroy 66 -- 275
David Lynn 68 -- 283
Justin Rose 66 -- 284
Keegan Bradley 68 -- 284
Ian Poulter 69 -- 284
Carl Pettersson 72 -- 284
Blake Adams 67 -- 285
Jamie Donaldson 70 -- 285
Peter Hanson 71 -- 285
Steve Stricker 71 -- 285
Bubba Watson 68 -- 286
Tiger Woods 72 -- 286
Adam Scott 73 -- 286
John Daly 69 -- 287
Phil Mickelson 74 -- 291
Ernie Els 73 -- 293