In October 2007, Gatorade announced that Woods would have his own brand of sports drink starting in March 2008. "Gatorade Tiger" was his first U.S. deal with a beverage company and his first licensing agreement. Although no figures were officially disclosed, Golfweek magazine reported that it was for five years and could pay him as much as $100 million. The company decided in early fall 2009 to discontinue the drink due to weak sales.
Masters Tournament: On Tuesday, April 15, two days after finishing second at the Masters, underwent arthroscopic surgery on his left knee in Park City, Utah, to repair cartilage damage. Expected to miss 4-6 weeks. It was the same knee operated on in 1994 for a benign tumor, followed by arthroscopic surgery in 2002. Began experiencing pain in mid-2007 when he injured his anterior cruciate ligament while running at home in Orlando following The Open Championship but opted not to have surgery at that time.
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.
Buick Invitational: Won his first start of the season for the fourth time in 11 seasons on TOUR. Became the first player in Buick Invitational history to win the tournament four times (1999, 2003, 2005-06). Made an eight-foot birdie on 72nd hole to get into a three-man playoff with Jose Maria Olazabal and Nathan Green. Green was eliminated after first hole, Olazabal on the second.
The Open Championship: Jumped to No. 2 in the Official World Golf Ranking, with a T3 finish at The Open Championship, his best performance in a major championship since finishing runner-up at the 2009 PGA Championship. Final-round 73 included a triple bogey on the par-4 sixth hole, his first triple in a major championship since the first hole at the 2003 Open Championship (Royal St. George's).
TOUR Championship: Claimed his 80th PGA TOUR title (second most behind Sam Snead's 82) with a two-stroke victory over Billy Horschel for his third-career TOUR Championship title (1999, 2007, 2018). Prior to his win at East Lake, it had been 1,876 days since he last won on the PGA TOUR (2013 World Golf Championships-Bridgestone Invitational). Moved from No. 20 to No. 2 in the FedExCup standings, finishing 41 points behind Justin Rose (T4) to become the fourth winner of the TOUR Championship who did not claim the FedExCup. Shared the first-round lead with Rickie Fowler (5-under 65) and the second-round lead with Rose (7-under 133) before moving to a three-stroke lead over Rory McIlroy following a third-round 5-under 65. Following a closing 1-over 71, improved to 54/58 when holding at least a share of the 54-hole lead on the PGA TOUR, including a 43/45 mark with the outright lead. Bogeys on Nos. 15 and 16 made things interesting coming down the stretch, but clutch pars on the final two holes sealed the victory. His 80th TOUR win came in his 346th start at the age of 42 years, 8 months and 24 days. By comparison, Snead was 47 when he won his 80th title. The victory was his fourth FedExCup Playoffs tournament title (2007 BMW Championship, 2007 TOUR Championship, 2009 BMW Championship, 2018 TOUR Championship. Ranked No. 2 in Strokes Gained: Putting for the week, making over 100 feet of putts each of the first three rounds and totaling 386'5" for the week (112'7"/R1, 101'5"/R2, 112'8"/R3, 59'9"/R4). Last posted his first three rounds in the 60s in a PGA TOUR event at the 2015 Wyndham Championship, but final-round 71 kept him from posting all four rounds in the 60s for the first time since THE NORTHERN TRUST 2013. Marked his 15th appearance in the TOUR Championship (first since 2013), with nine top-10 showings at the event, including three wins and four runner-up finishes.
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.