Day slipped back after dropping a shot at the 11th, and he is joined on 14 under by Fowler - the American signing for a solid 70.
Day's tee shot at the 188-yard par-three 17th landed just in front of the green, took a couple of bounces and trickled into the hole, much to the Australian's surprise.
The 33-year-old regained the stroke with a ideal 20-foot putt at the fifth, although he then missed from four feet for par at the seventh before a nice up-and-down at the par-five next got him back under the card for the day.
Watching Victorian native Leishman blitz the field with rounds of 62-64, and fellow former world No.1 Day bag a hole-in-one, has Smith fired up to have a big weekend.
'The game's feeling really good.
"Knowing I had already made the BMW probably affected my concentration a little in the first two FedEx Cup play-offs events".
The BMW Championship is the second last event in the lucrative FedEx Cup series.
But the 33-year-old Leishman is sitting on a gold mine. Marc Leishman still at 21 under. Although in some ways, Jason Day has been on top at Conway Farms for the last 24 months.
Fowler started promisingly by sinking a 25-foot eagle putt from the fringe at the par-five first, but he struggled to buy a putt thereafter, his only birdie a near tap-in at the par-five 14th.
The Northern Irishman, who entered the tournament at his lowest world ranking - sixth - for more than three years having missed the cut at the Dell Technologies Championship, needed a good performance this week in order to reach the top 30 qualifying places for next week's season final Tour Championship in Atlanta.
Rory McIlroy's (300/1) hopes of making it to next week's finale at East Lake appear slim, but a two-under back-nine had him moving in the right direction albeit 15 shots behind the pace-setter.
Leishman capped his round with a birdie at the par-five 18th to put himself in prime position to seize a third US PGA Tour title on Sunday. Jamie Lovemark and Charley Hoffman also opened at 64.
Defending champion: Dustin Johnson.
On the seventh hole, Leishman chipped in beautifully before rolling the ball in on the long green for a birdie, before repeating the trick, putting in from beyond the fringe on the eighth.
"It's very quick down there so I just wanted to get something just landing on the green", he said.
India's Border Security Force (BSF ) said that Pakistani soldiers fired at several positions along the volatile worldwide border. There has been persistent truce infringement by the Pakistani troops for as long as three days.
He expressed frustration with the North's continued provocations including its sixth and largest nuclear test on September 3. While the latest sanctions are not as tough as what the U.S. had sought, they are expected to have a significant impact.
Security Council, that's going to be very hard ", Tillerson added, according to an official transcript. Secretary of State Rex Tillerson arrives at 10 Downing Street in London , Britain, September 14, 2017.
Update 1 a.m.: Hurricane Irma sustains Category 2 hurricane winds of 100 mph as its center moves 15 miles southwest of Lakeland. The wind was already picking up in St Petersburg, some 400 miles north the Keys, and people began bracing for the onslaught.
While the news was expected following the rave reviews to Wonder Woman , it is Jenkins' pay packet that has left many agape. Her salary for the sequel is on par with the amount of money Zack Snyder received for directing Man of Steel .
For Golovkin , the fight is the culmination of a long battle to establish himself as the top middleweight in the world. Expect action that will leave fans begging for a rematch from fighters extremely dedicated to their craft.
After Apple Watch 3, Apple has today also launched a 4K-capable version of its Apple TV set-top box at its keynote event. On the inside, the Apple TV 4K uses the A10X Fusion, which is the same chip that powers the latest iPad Pro .
Within a year of arriving at Saturn, Cassini captured images of plumes of water vapor jetting out from near the moon's south pole. And it has also captured some attractive and never seen before images of the ring planet and its moons, through its lenses.
But a loan from the German government is keeping the carrier afloat while attempts are made to sell off parts of the airline. The deadline for offers for the airline is Friday, with the creditors' committee hoping to make a decision on September 21.
ICC CEO says can't force India for Pakistan series
Grant even conveyed his feelings that he is hopeful that Pakistan will soon be able to play Test cricket on its home soil. In the next over Morkel was run out at just 1 and the World XI side was in heaps of trouble.
Samsung Creates $300M Autonomous Driving Fund
But the firm said it will not enter the car-manufacturing business, and will instead work with vehicle makers on their projects. The announcement comes shortly after Samsung completed its acquisition of American audio and in-car technology firm Harman .
Arkansas's uninsured rate has dropped by half since 2013
Advocates worry all of the uncertainty and changes will confuse consumers and hurt their ability to sign up for health insurance. The data shows that 2016 was the third straight year the bureau found a decline in the share of people without health insurance.
Destiny 2 Under Maintenance
The Leviathan Raid starts at 6pm United Kingdom time, although you won't get very far if you're not at the required Power Level . Turns out, you don't have to do too much grinding to participate in the Raid . "We renounce hate in all forms".
Dybala's commitment to Juve
Raiola said that the Argentine forward should leave the Italian champion and join the likes of Real, Manchester City, Man United or Chelsea.
New Xiaomi Mi Notebook Pro Starts at Only $850
However, we can't argue with the Mi Notebook Pro's pricing , which starts at just $850 with 8GB of RAM and a Core i5 processor. Xiaomi's Mi Notebook Pro comes out into the markets with a 15.6 inched display which is protected by Corning Gorilla Glass 3.