Tiger Woods is pulling out all the stops in an effort to reel in runaway Players Championship leader Webb Simpson during the final round.
The 14-time major winner Woods has raced up the leaderboard at TPC Sawgrass, picking up six shots to race into a share of second at 14-under-par through 13 holes.
Woods joins New Zealand's Danny Lee, who is playing in the final group, sitting four shots back of 2012 US Open winner Simpson.
Simpson started the final day at 19 under and with a seven-shot lead before picking up a shot through seven holes.
But bogeys at the 10th and 11th holes have dropped him to 18 under.
Australian Jason Day is a shot back sharing fourth at 13 under, but is struggling to get it going on the back nine after a hot front side featuring three birdies.
Day's countryman Adam Scott is enjoying a solid final round, with four birdies elevating the 2004 TPC Sawgrass champion to 11 under sharing ninth.
Marc Leishman is struggling on the final day, dropping four shots to sink to three under.
Earlier, Brooks Koepka fired a stunning 63 to match the course record.
With a niggling wrist injury that kept him out of the game for 15 weeks this year, Koepka ignited the TPC Sawgrass galleries when he carded an albatross on the par-5 16th hole.
The big-hitting Koepka holed out a 6 iron for his second shot from 208 yards en route to finishing at 11 under.