ATLANTA—FedEx Cup points leader Dustin Johnson birdied the 18th hole to shoot a 4-under-par 66 on Thursday and join Kevin Chappell and Hideki Matsuyama at the top of the leaderboard at the Tour Championship, the final event in the FedEx Cup playoffs.
Fourteen of the 30 players in the field shot par or better on the sunny, wind-free day at East Lake Golf Club.
Three players are tied at 3-under 67 - Kevin Kisner, Si Woo Kim and World No. 1 Jason Day. Finishing at 68 were defending champion Jordan Spieth, Justin Thomas, Paul Casey and Rory McIlroy.
Defensive tackle Sharrif Floyd had arthroscopic surgery Thursday to clean out cartilage in his right knee.
The 25-year-old will miss Sunday's game at the Carolina Panthers (1 p.m. ET) and likely a few more after that. Floyd sat out four games last season after having cartilage removed from his knee last October.
A first-round draft pick in 2013, Floyd hasn't been on the field since playing in the season opener.
The Minnesota Timberwolves are working on a buyout for Kevin Garnett that would end the forward's second stint with the team.
Minnesota opens training camp on Tuesday and would like to have a solution before it starts, preferably with the 40-year-old Garnett electing to retire.
Garnett is entering the final season of his contract and hasn't given the Timberwolves an answer on which direction he is leaning. He has spent 13 1/2 of his 21 NBA seasons with Minnesota.
The 15-time All-Star ranks 17th in NBA history with 26,071 career points, ninth in career rebounds with 14,662 and 17th in career blocked shots with 2,037.