Masters champion Charl Schwartzel turned anger into a string of birdies for a 5-under 66 on Saturday that put him in a three-way tie for the lead with Adam Scott and Bubba Watson in the Deutsche Bank Championship.
Watson, who finally put some attention back on his golf, played in the morning and produced what he called a "boring" round of 64 that included an eagle on the seventh hole for the second straight day.
Scott, who won on the TPC Boston eight years ago, shot 63 during the afternoon rounds.
The morning was filled with big cheers, mostly around one hole.
Brandt Snedeker hit 9-iron from 146 yards on the par-3 16th, and the ball spun back to the right and into the cup. Some 20 minutes later, Greg Chalmers also made an ace.
Snedekerwent on to a 64 and was one shot behind. Nick Watney, a two-time winner on tour this year, had another 67 and was two shots behind.
The leaders were at 10-under 132 as they work to a Labor Day finish.
The top 70 on the FedEx Cup list after this week advance to the third playoff event outside Chicago in two weeks, with the top 30 from there going to Atlanta for a shot at the $10 million prize.
PGA EUROPEAN: Jamie Donaldson shot a 6-under 65 to pull ahead of Lee Westwood and Rory McIlroy and lead the European Masters after three rounds. Donaldson is at 14 under and seeking his first career win. He is one stroke in front of Westwood with McIlroy.