Earned his 80th PGA TOUR victory and first since 2013, winning the TOUR Championship for the third time in his career to move within two of Sam Snead's TOUR-best 82 victories. Finished the season No. 2 in the FedExCup, with runner-up finishes at the Valspar Championship and PGA Championship among his seven top-10s. Led the TOUR in Strokes Gained: Approach the Green (0.938) for the sixth consecutive season in which he played the minimum number of rounds. After originally being selected as a Captain's Assistant for the United States Ryder Cup team, was later selected as a captain's pick and played in the event for the eighth time.
AT&T Pebble Beach National Pro-Am: Searching for his first PGA TOUR win since the 2009 BMW Championship, carded a final-round 3-over 75 and was unable to match playing partner Phil Mickelson's stellar, 8-under 64 that led to victory at the AT&T Pebble Beach National Pro-Am. Paired with Phil Mickelson for the 30th time in a PGA TOUR-sanctioned event. The T15 finish came in his seventh start at the event and first since finishing T12 in 2002.
THE PLAYERS Championship: In his next start, claimed on Mother's Day his second PLAYERS Championship victory after opening with a pair of 5-under 67s. He had previously not had back-to-back rounds in the 60s at THE PLAYERS since the second and third rounds in 2004 (T16). The only other time he accomplished the feat was in 2001 (second, third and fourth rounds), when he won. With his win, joined Jack Nicklaus, Steve Elkington, Hal Sutton, Fred Couples and Davis Love III as multiple winners of the event. The victory at TPC Sawgrass became his fourth of the campaign, the earliest he has achieved the feat in a season. The win was also his 16th in Florida, the most of any state. Converted the 54-hole lead for the 53rd time (in 57 attempts).
Won seven times en route to capturing the inaugural FedExCup, cruising through the PGA TOUR Playoffs for the FedExCup with two wins and a T2 in three starts. Captured 13th career major championship (second all-time to Jack Nicklaus' 18) and finished the year with 61 official PGA TOUR victories, fifth all-time. Adjusted scoring average was 67.79, matching own record set in 2000. With 60 official rounds, won his seventh career Vardon Trophy and also captured the Byron Nelson Award.