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.
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.
Earned his 81st PGA TOUR victory and 15th major championship title at the Masters Tournament and qualified for the FedExCup Playoffs for the eighth time, advancing to the BMW Championship for the eighth time and finishing the season No. 42 in the FedExCup standings. In the Playoffs, withdrew from THE NORTHERN TRUST and finished T37 at the BMW Championship, failing to advance to the TOUR Championship to defend his title. Collected four top-10s and made nine cuts in 12 starts.
On May 29, 2017, Woods was arrested near his Jupiter Island, Florida, home by the Jupiter Police Department at about 3:00 am. EDT for driving under the influence of alcohol or drugs. He was asleep in his car, which was stationary in a traffic lane with its engine running. He later stated that he had taken prescription drugs and did not realize how they might interact together. On July 3, 2017, Woods tweeted that he had completed an out-of-state intensive program to tackle an unspecified issue. At his August 9, 2017 arraignment, Woods had his attorney Douglas Duncan submit a not guilty plea for him and agreed to take part in a first-time DUI offender program and attend another arraignment on October 25.
The Open Championship: Earned 10th professional major title at The Open Championship at age 29 years, 6 months and 17 days in his 35th major as a professional. Posted rounds of 66-67-71-70–274 at St. Andrews to defeat nearest challenger Colin Montgomerie by five strokes. The youngest and quickest to win each of the four major championships twice. Jack Nicklaus was the first to accomplish the feat at 31 years, 1 month and 7 days when he won his second PGA in 1971 in his 37th major as a professional. Sixth player in The Open Championship history to win in wire-to-wire fashion–Ted Ray (1912), Bobby Jones (1927), Gene Sarazen (1932), Henry Cotton (1934) and Tom Weiskopf (1973).
Arnold Palmer Invitational presented by MasterCard: Sank a 24-foot birdie putt on the final hole to beat Bart Bryant and win the Arnold Palmer Invitational presented by MasterCard by one stroke, extending his PGA TOUR winning streak to five tournament starts. The win was the 64th of his career, tying Ben Hogan at No. 3 on the PGA TOUR career victory list.
Woods collaborated closely with TAG Heuer to develop the world's first professional golf watch, which was released in April 2005. The lightweight, titanium-construction watch, designed to be worn while playing the game, incorporates numerous innovative design features to accommodate golf play. It is capable of absorbing up to 5,000 Gs of shock, far in excess of the forces generated by a normal golf swing. In 2006, the TAG Heuer Professional Golf Watch won the prestigious iF product design award in the Leisure/Lifestyle category.