The list includes Tiger Woods, who shot 66 and made up no ground on the lead. A victory at Aronimink might even be enough for Jim Furyk to take the 24-year-old from San Diego as the final captain's pick for the Ryder Cup.
At stake is chance for Rose to reach No. 1 in the world for the first time with his third title in the Philadelphia area, including his U.S. Open at Merion five years ago.
Rose, who won the former AT&T National here in 2010, bogeyed his opening hole Thursday and hasn't dropped a shot since. Tommy Fleetwood is one shot behind Woods after hitting eight birdies for an eight-under-par round of 62 to charge up the leaderboard. He then made par at every hole on the back nine, but still took the lead.
The BMW Championship is the second last event of the $US67 million ($A93 million) play-offs series and decides the top 30 on the FedExCup standings who advance to the Tour Championship finale. It looked like all the putts were going to go in, but they didn't go in today.
"I played well. The crowd latched onto it, for sure". He was one over through 8 before birdieing two of the next three holes to get to one under for the day and nine under for the tournament.
But he knows that rival Tony Finau, who matched his 64 to stand on 132 alongside Woods, is also shooting for a Ryder Cup pick from USA captain Jim Furyk.More news: New wildfire rips through northern California
"I guess I had good sort of good vibes and good memories and it was nice to see it go in".
Jason Day (64) and Justin Thomas (67) are level with McIlroy at 9 under, while Tony Finau matched Schauffele's score to get to 8 under.
At stake for Rose is moving to No. 1 in the world for the first time in his career. "I wasn't doing much".
Starting times were moved up to 7 a.m. Sunday with hopes that the heavy rain stays away, and that the final round can get in.
After a drive to the right rough on the 466-yard par-4 12th hole, Landry chipped in his third, carding a birdie for the hole.
Tiger hit 16 of 18 greens in regulation while continuing to drive the ball better than he has for the majority of the season.