World Golf Championships-Bridgestone Invitational: Collected his sixth title at the World Golf Championships-Bridgestone Invitational in Akron. Won by eight strokes after a closing 5-under 65 at Firestone CC. Joined Jack Nicklaus (Masters/Augusta National), Sam Snead (Miami Open/Miami Springs G&CC) and Alex Ross (North & South Open/Pinehurst No. 2) as the only players to win six TOUR events on the same course.
Woods continued to excel in 2007 and the first part of 2008. In April 2008, he underwent knee surgery and missed the next two months on the tour. Woods returned for the 2008 U.S. Open, where he struggled the first day but ultimately claimed a dramatic sudden death victory over Rocco Mediate that followed an 18-hole playoff, after which Mediate said, "This guy does things that are just not normal by any stretch of the imagination," and Kenny Perry added, "He beat everybody on one leg." Two days later, Woods announced that he would miss the remainder of the season due to additional knee surgery, and that his knee was more severely damaged than previously revealed, prompting even greater praise for his U.S. Open performance. Woods called it "my greatest ever championship." In Woods' absence, TV ratings for the remainder of the season suffered a huge decline from 2007.
Woods had a poor showing at the 2013 U.S. Open as a result of an elbow injury that he sustained at The Players Championship. In finishing at 13-over-par, he recorded his worst score as a professional and finished 12 strokes behind winner Justin Rose. After a prolonged break because of the injury, during which he missed the Greenbrier Classic and his own AT&T National, he returned at the Open Championship at Muirfield. Despite being in contention all week and beginning the final round only two strokes behind Lee Westwood, he struggled with the speed of the greens and could only manage a 3-over-par 74 that left him tied for 6th place, five strokes behind eventual winner Phil Mickelson. Two weeks later, Woods returned to form at the WGC-Bridgestone Invitational, recording his 5th win of the season and 8th win at the event in its 15-year history. His second round 61 matched his record score on the PGA Tour and could easily have been a 59 were it not for some short missed birdie putts on the closing holes. This gave him a seven-stroke lead that he held onto for the rest of the tournament. Woods would never contend at the PGA Championship at Oak Hill Country Club and would come short of winning a major for the 5th full season, only contending in two of the four majors in 2013.
Early in Woods' career, a small number of golf industry analysts expressed concern about his impact on the competitiveness of the game and the public appeal of professional golf. Sportswriter Bill Lyon of Knight Ridder asked in a column, "Isn't Tiger Woods actually bad for golf?" (though Lyon ultimately concluded that he was not). At first, some pundits feared that Woods would drive the spirit of competition out of the game of golf by making existing courses obsolete and relegating opponents to simply competing for second place each week.