WGC-Bridgestone Invitational 2014 at Firestone Country Club PGA Tour

Rory McIlroy shot a 4-under 66 at Firestone Country Club on Sunday, rallying from three shots back to defeat Sergio Garcia by two shots at the WGC-Bridgestone Invitational.

McIlroy threw his winning ball into the crowd assembled around the 18th green.

McIlroy admires his new hardware. The title -- his eighth on the PGA Tour -- comes on the heels of his wire-to-wire victory at the British Open.

With the win, McIlroy reclaims the No. 1 spot atop the Official World Golf Ranking.

Sergio Garcia had a three-shot lead going into the final round, but McIlroy fired off three straight birdies and already had the lead when he stood on the fourth tee.

Garcia closed with a 1-over 71, and his runner-up finish bumped him to third in the Official World Golf Ranking.

Tiger Woods withdrew eight holes into the final round at Firestone. He said that he "jarred" his back while attempting an awkward shot from the lip of a bunker on the second hole.

As he left the course, Woods did not say whether he would be able to play the PGA Championship next week.

Marc Leishman finished alone in third after closing with a 3-under 67.

Three back-nine bogeys dropped Keegan Bradley out of contention. His 1-under 69 left him in a tie for fourth place with Charl Schwartzel, Patrick Reed, and Justin Rose.

Sergio Garcia tees off on the ninth hole during the third round of the Bridgestone Invitational.

Sergio Garcia warms up on the practice range during the third round of the Bridgestone Invitational. Garcia tied the course record with a 61 on Friday.

Tiger Woods doesn’t like his tee shot on the 6th hole during the third round of the Bridgestone Invitational.

Tiger Woods putts on the first green during the third round of the Bridgestone Invitational. Woods shot a 2-over 72 on Saturday.

Rory McIlroy reacts after missing a birdie on the first hole green during the third round of the Bridgestone Invitational.

Rory McIlroy lines up a putt on the fourth green during the third round of the Bridgestone Invitational.

Rickie Fowler hits off the fourth tee during the third round of the Bridgestone Invitational.

Keegan Bradley hits off the fourth tee during the third round of the Bridgestone Invitational. Bradley won this event in 2012.

Adam Scott hits off the second tee during the third round of the Bridgestone Invitational.

Hideki Matsuyama plays a shot on the 14th hole during the third round of the Bridgestone Invitational.

Sergio Garcia stormed to a three-shot lead with a course-record tying 61 in the second round at Firestone Country Club.

Sergio rolls in a put on the 18th green to shoot 27 on the back, the low nine holes of his career.

Sergio hits an approach to the third hole. He birdied his final seven holes of the day.

Phil Mickelson who played with Sergio Garcia, shot 73 and is tied for 53rd at +4.

Justin Rose waves to the crowd as he walks to the ninth green. Rose shot a 3-under 67 to get to -8, three shots off the pace set by Sergio Garcia.

Charl Schwartzel is five shots back of Sergio Garcia after a second-round 69.

Rory McIlroy didn't like this shot on No. 7, but he hit plenty of good ones to card a 64 in the second round. He is tied for third, four shots behind Sergio.

Patrick Reed kept himself in contention with a 68 in the second round.

Tiger Woods hits a shot from the rough on the 13th hole. He struggled off the tee and on the greens to shoot a 1-over 71. He enters the weekend T25 at -1.

Tiger Woods cools off while waiting to his his approach shot to the 10th green. The defending WGC-Bridgestone champion, Tiger has won eight times at Firestone.

Justin Rose and Rickie Fowler walk to the 16th green. Fowler shot his second consecutive 67 and was -6, four shots off the lead.

Rickie Fowler is currently fourth in Ryder Cup rankings and is 11th on the PGA Tour money list.

Tiger Woods hits his approach shot to the 11th. PGA Championship pairings were announced during the second round and Tiger will play the first two days with Phil Mickelson and Padraig Harrington.

Woods began the day with a three-putt bogey at the 1st.

THURSDAY

He rebounded with a birdie at the 2nd.

In all, Woods had six birdies, two bogeys, and a double bogey.

He has won this event eight times, including last year.

Marc Leishman had the score of the day to take sole possession of the lead at six under.

Rory McIlroy had a solid round, shooting a one-under 69.

McIlroy is fresh off a victory at the British Open, his third major title.

His round featured four birdies.

Ryan Moore shot a five-under 65 in the morning to get into a three-way tie for second at five under.

Moore is ranked no. 18 in the FedEx Cup standings coming into this week.

Sergio Garcia is four back after an opening-round 68.

Garcia gave Rory McIlroy a run for his money at the British Open.

Phil Mickelson had an up-and-down round, finishing at one over.

Mickelson is recovering from a bout with strep throat.

Keegan Bradley shot a two-under 68.

Bradley chats with Webb Simpson on the course.