Third round leaderboard:
-16 R Fowler (US) -13 R Barnes (US), T Petrovic (US) -12 J Rose (Eng) -11 B de Jonge (Zim) -9 S O'Hair (US), J Overton (US), B Van Pelt (US), K Perry (US), J Furyk (US), S Levin (US)
Selected others:-8 R McIlroy (NI), P Mickelson (US) -7 V Singh (Fij) -6 T Woods (US)
Fowler is one of the most highly rated young players on the PGA Tour
Rising star Rickie Fowler maintained his three-shot lead at the end of the third round of the Memorial Tournament, but Justin Rose slipped off the pace.
Fowler fired a 69 to move to 16 under and keep Ricky Barnes, who scorched round in 62, and Tim Petrovic at arm's length in a share of second place.
Rose looked set to challenge for the lead, but dropped shots at the 15th and 16th saw him fall four shots adrift.
Rory McIlroy moved to eight under, with Tiger Woods two shots further back.
The weather again had a major impact in Ohio, with delays to play caused by storms in the region.
Rose, who finished the first round in a tie for the lead, made a real charge on the back nine, making birdies at the 10th, 11th, 12th and 14th, only to spoil his card somewhat with the bogeys at the 15th and 16th.
Fowler was once again in impressive form, extending his bogey-free streak to 52 holes.
"I'm hitting the ball well," said the 21-year-old.
"I kept it out of trouble, and I knew opportunities were coming around. It was a matter of waiting for them.
"I want to win against the best. That doesn't change the way I play."
But it was Barnes - paired with defending champion Woods - who really shone on "moving day".
The 29-year-old started with a birdie at the first and went on to make another seven, not to mention an eagle at the 11th, to record a round of 10-under.
"I think it probably got noticed a little bit more," said Barnes.
"Obviously, the cameras were probably already in our group, so they didn't need to go anywhere. I'll take a 62 anywhere, whether it's with my buddies or a Saturday at the Memorial."
Woods' round of 69, which included a double bogey, left him 10 shots off the pace in a tie for 20th, and two shots behind world number two Phil Mickelson.