Keegan Bradley in pole position on final day of BMW Championship

Bradley made the most of a rollercoaster day, splitting eight birdies with six bogeys to card a two-under 70 and head into the final day at Castle Pines Golf Club on 12 under.

"I played some brilliant golf but I hit also some terrible shots, too," said Bradley, as per pgatour.com.

"I guess that's the way of the world," Bradley said. "But I'm proud of the way I fought there in the end."

He overtook Scott for the top spot on the final hole, with the Australian struggling to a third-round score of 74 — two late birdies helping him keep in touch with Bradley.

Speaking after his round, Scott said: "I kind of felt like I made a meal of that, and I didn't feel like I did that much wrong — a couple of drives were just not quite right, and a three-putt, and all of a sudden I'm kind of chasing.

"I'm in a good spot in the end of it to be one back."

The Swedish duo of Ludvig Aberg and Alex Noren are tied for third on 10 under after carding 71 and 70 respectively.

American Xander Schauffele is three shots further back on seven under.