Jordan Spieth birdied three of his last five holes to grab a three-shot lead after the third round of the Northern Trust.
Spieth began the day in a four-way tie for the lead, but he quickly broke out of that with four birdies in his first eight holes at Glen Oaks Club on Saturday.
Winner of this year's Open Championship, Spieth used a hot putter to separate himself from the rest of the field.
Spieth ultimately shot a six-under 64 to get to 12 under for the tournament, which is the first of this year's FedEx Cup Play-offs.
Dustin Johnson, who also started the day tied for the lead, shot a three-under 67 to get to nine under.
He finished round three with four birdies and one bogey. Johnson, still ranked world number one, has just one top 10 since injuring himself before the Masters.
Jon Rahm (67), Paul Casey (66), Matt Kuchar (68) and Patrick Reed (66) are all tied for third at seven under.
Casey, who often contends but has struggled to get over the hump and win, provided some insight into what he thinks it will take for him to be successful more often.
"Get rid of Jordan [Spieth] and Dustin [Johnson] from the top of the leaderboards," Casey said.
Keegan Bradley (66) is outright seventh at six under, a shot ahead of Kevin Chappell (64) and Justin Rose (69).
Rickie Fowler dropped out of contention after a 74 left him at two under and alongside the likes of Jason Day (68) and Henrik Stenson (67) in a tie for 22nd.
Rory McIlroy continued his recovery with a one-under 69 getting him back to even par.
20 de enero 2018
|Kerber downs Sharapova in Melbourne masterclass|
|I prefer Fekir to Neymar - Lyon president Aulas fires another pre-match barb at PSG|
|Wales dealt Priestland blow ahead of Six Nations|
|Zverev fails to reach last 16 after shock loss to Chung|
|Will Smith brings A-list power to the Big Bash League|
|Sleep and chocolate – Halep too exhausted to think about tennis|
|Beal leads Wizards past Pistons, Raptors edge Spurs|
|Dortmund boss Stoger leaves door open for Aubameyang return amid Arsenal links|
|Davis tired but upbeat after matching Aus Open record in marathon loss to Halep|
|Halep prevails in record-equalling epic at Australian Open|
|Neymar can play with Ronaldo at Real Madrid – Mijatovic|
|Dyche compares Sanchez-Man United move to Harry Potter|
|Landry grabs second-round lead as Rahm lurks|
|Kristaps Porzingis takes subtle jab at fans, media for All-Star starter snub|
|Schurrle annoyed at more dropped Dortmund points|
|Carrick expected to become Man Utd coach, reveals Mourinho|
19 de enero 2018
|Koepka faces race to be ready for Masters|
|Barkley ´obsessed´ with becoming world-class at Chelsea|
|Guardiola wants ´three or four´ signings but rules out Sanchez alternative|
|Conte defends Chelsea amid surprise Carroll & Crouch links|
|Atlanta United wrap up Barco signing for MLS record fee|
|Derby County 0 Bristol City 0: Penalty controversy in goalless draw|
|Pau clinch top spot with perfect record|
|Hertha Berlin 1 Borussia Dortmund 1: Kagawa equalises in Aubameyang´s absence|
|Brighton break transfer record for Locadia|
|Dortmund still waiting on ´concrete´ offer for Aubameyang|
|Tom Brady addresses media, reveals no details of hand injury|
|Can will ´give everything´ at Liverpool despite Juventus talks|
|One Direction star trained with Mourinho´s Chelsea|
|Goretzka asks Schalke fans to not turn on him after agreeing Bayern deal|
|Youngs agrees new Leicester deal|
|Wozniacki slams ´rude´ umpire after Bertens win|
|Van Persie secures return to Feyenoord|
|Conte should replace Wenger at Arsenal, claims Carragher|
|Kimmich named Germany’s 2017 Player of the Year|
|Nadal´s best required against in-form Schwartzman|
|Moyes denies scouting Batshuayi and deals Chelsea blow with Carroll injury|
|Vunipola´s Six Nations hopes dashed as 12-week absence confirmed|
|No one like Ronaldinho until Messi - Guardiola lavishes praise on Brazil great|
|Simeone shrugs off mentality concerns at Atletico Madrid|
|Going for gold? Neymar meets Beckham in matching jackets|
|You think I change my mind that quick? – Klopp faithful to No.1 Karius|
|Conte backs Morata to overcome disciplinary concerns|
|Lloris a doubt for Southampton game, confirms Pochettino|
|Pieters edges into Abu Dhabi lead|
|Klopp doubts Alexis Sanchez tug-of-war decided by money|
|Conte admits Pedro dived|
|Valencia tie down Torres amid Real Madrid, Barcelona reports|
|Bangladesh claim record win over Sri Lanka|
|Congratulations! Guardiola offers well wishes to United-bound Sanchez|
|Pele pulls out of London event amid conflicting health reports|
|Conte would be ´happy´ for transfer help|
|Kontaveit dumps Ostapenko out, Wozniacki battles through|
|Sanchez to United not done at all, insists Mourinho|
|Rafa sails through, Kyrgios books Dimitrov showdown|
|Emery refuses to indulge Neymar-Cavani penalty debate|
|Wozniacki battles past stubborn Bertens|
|Goretzka chose Bayern over England, Spain and Italy – Heynckes|
|BBBofC ready to lift Fury suspension|
|I would reject such players – Heynckes slams ´selfish´ Aubameyang|
|Kyrgios proves cool credentials to Will Smith in Tsonga win|
|Western Sydney Wanderers 0 Melbourne Victory 3: Barbarouses extends purple patch|
|Conte likes Dzeko but Chelsea have made no offer, says agent|
|Goretzka´s Bayern move good for Bundesliga, suggests Rummenigge|
|Root guides England home as Finch century proves in vain again|
|Walcott left Arsenal with his things in bin bags|
|Nadal breezes past Dzumhur in Melbourne|
|Schalke confirm Goretzka will join Bayern|
|Sergi Roberto renews Barca deal until 2022|
|Fernandinho seals extended Manchester City contract|