Florida: Justin Rose hit a four-under-par 66 to steal the limelight from Rory McIlroy in the Honda Classic in Florida. The 31-year-old Rose shared the lead with American Tom Gillis at eight-under-par after day two on Friday.

But US Open champion McIlroy, who will become world number one if he wins on Sunday, fired in three birdies in the last five holes to finish one behind.

"Still a lot of golf left -- 36 holes," McIlroy said after a 67 in the breezy, balmy afternoon. "I just need to keep doing the same things, try to drive the ball in the fairway and give myself loads of opportunities, and try and take a few. Because you don't need to make tons of birdies out here."

Maybe not, but that was the recipe for Brian Harman, who shattered the course record by three shots and even flirted with golf's magic number before he had to settle for par on the 543-yard closing hole for a 61.

Birdies also helped Tiger Woods, though not enough to offset a tee shot into the water on the par-3 fifth for a double bogey in his round of 68 that put him seven shots out of the lead.

Rose made five birdies in a nine-hole stretch in the middle of his round and was at 10 under until back-to-back bogeys, an example of how this course can stop momentum quickly. He wound up at 8-under 132 with Gillis, a 43-year-old journeyman who had a 64 and is atop the leaderboard for the first time after any round of a PGA TOUR event.