18 September, 2017
After two birdies and two bogeys in his first seven holes, Leishman birdied the eighth to make the turn at one-under for the day, and picked up two more birdies coming in as the field failed to mount a challenge.
Day, who is tied with Rickie Fowler in second place, didn't seem too bothered.
"The 62 was obviously pretty nice but, you know, today was nearly as satisfying going into a Saturday with a lead to play the way I did, gave myself a lot of chances".
With Fowler and Day unable to apply significant pressure, Leishman reeled off a series of pars until he holed another good putt from mid-range at the 13th, and a deft up-and-down from the rear rough at the final hole yielded another birdie which saw him close on 19 under par. I missed those today and, unfortunately, shot 1 under. "It certainly took a few holes for me to adjust to it and I didn't quite have the stuff".
Justin Rose muscled his way into fourth place thanks to five birdies in a bogey-free 66 for a 12-under tally but admitted he has his work cut-out to reel-in the Aussie.More news: Jack Wilshere Rejected Loan Move To Trabzonspor To Focus On Arsenal Career
McIlroy won the FedEx Cup previous year but the Northern Irishman is set to relinquish his crown with a Tour Championship berth virtually out of reach as he continues to struggle at the BMW Championship. "It stung a bit", said Leishman. "Quite happy with how he's happy because we're on the Presidents Cup team together but saying that, I mean he's going to be very hard to beat tomorrow". Very easy to throw a mediocre round in there. (He's) hitting it on the greens and holing putts. "Tomorrow, I need to execute". "That's a good formula for success, and it's going to be tough".
Fellow Australian Day (5/1), Charley Hoffman (16/1) and Jamie Lovemark (25/1) were his nearest challengers on seven under, while Fowler (7/1) lies in the group a further shot back after birdieing six of his final seven holes.
Phil Mickelson is trying to find his way into the top 30.
Day, who last won 16 months ago, chipped in from behind the 14th green for his second eagle of the week, and then added a third eagle with one swing, which was actually a hole-in-one on the Par-3 17th hole with a 7-iron that turned into a payoff for multiple parties.