Russell Henley made five birdies in a seven-hole stretch Sunday and had a 6-under 65 to take a one-shot lead in the Deutsche Bank Championship.
For the second straight week, a FedEx Cup playoff event is wide open going into the final round.
This one includes Rory McIlroy.
The world's No. 1 player had a 64. McIlroy was two shots off the lead at the TPC Boston heading into the Labor Day finish. Jason Day (69) and Chris Kirk (64) also were two behind. Ten players were separated by four shots.
Henley won the Honda Classic in a four-man playoff earlier this year. He was at 12-under 201.
Billy Horschel birdied his last three holes for a 67 and will play in the final group with Henley.