Set or tied 27 TOUR records. Won three consecutive majors (U.S. and The Open Championships, PGA Championship) and career Grand Slam and totaled nine TOUR victories. Non-adjusted scoring average of 68.17 best in golf history, surpassing Byron Nelson's 68.33 unofficial mark of 1945. Finished the year with 47 consecutive rounds of par or better and completing all 20 events started under par. Won TOUR player of the year honors. Joined Ben Hogan (1953) as the only men to win three professional majors in one season. Was 53-under in four majors, next-best mark was 18-under by Ernie Els. Nine TOUR victories most in one season since Sam Snead won 11 in 1950. Season-opening victories at Mercedes Championship and AT&T Pebble Beach National Pro-Am gave him wins in six consecutive starts, most since Hogan in 1948. Beat Els in a playoff at Mercedes, then came from seven strokes back with seven holes to play at Pebble Beach, keyed by an eagle-birdie-par-birdie finish, for a 64 and a two-stroke win. Finished T2 at Buick Invitational.
PGA Championship: Despite not hitting a fairway until the 10th hole Sunday, made eight birdies and two bogeys to post a 6-under 64, tying the day's low round. Finished solo-second at 14-under 266, two strokes behind Brooks Koepka. The runner-up finished marked his 31st on the PGA TOUR and first time taking solo-second since the 2009 TOUR Championship. Was looking to tie Jack Nicklaus and Walter Hagen for most PGA Championship victories. A win would have marked his first major championship title since the 2008 U.S. Open, a span of 3,709 days.
The next decade of Woods' career was marked by comebacks from personal problems and injuries. He took a self-imposed hiatus from professional golf from December 2009 to early April 2010 in an attempt to resolve marital issues with his then-wife, Elin. Extramarital affairs with Woods had been alleged by several women, and the couple eventually divorced. Woods fell to number 58 in the world rankings in November 2011 before ascending again to the No.1 ranking between March 2013 and May 2014. However, injuries led him to undergo four back surgeries between 2014 and 2017. Woods competed in only one tournament between August 2015 and January 2018, and he dropped off the list of the world's top 1,000 golfers. On his return to regular competition, Woods made steady progress to the top of the game, winning his first tournament in five years at the Tour Championship in September 2018 and his first major in 11 years at the 2019 Masters.
THE TOUR Championship presented by Coca-Cola: Entered the TOUR Championship No. 1 in the FedExCup standings and romped for his seventh victory of the season by eight over Mark Calcavecchia and Zach Johnson with rounds of 64-63-64-66–257 and captured the first FedExCup. Season earnings were a career-best $10,867,052. First player to win the TOUR Championship multiple times.
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.