Britain’s Tommy Fleetwood is four shots behind in second place, with JB Holmes, Justin Rose and Brooks Koepka close behind.
All tee times for Sunday have been moved forward due to expected adverse weather, the competition has announced.
The very first tee time (just an extra space here) at Royal Portush will be at 7.32am, with the leaders teeing off just over five hours later, at 1.47pm.
Bad weather is expected to hit the course late in the evening on day four.
That means the golfers will tee off an hour earlier than last year’s final day at Carnoustie.
It also means that the final tee time is a full three hours earlier than Saturday’s day three.
“Sunday’s tee times at The 148th Open have been moved forward due to the adverse weather forecast,” a statement read.
“The first tee time for the fourth and final round at Royal Portrush will be at 7:32am, with the leaders beginning their final round at 1.47pm.”
Brit Ashton Turner will be the first to tee off in the morning at 7.32am. He’s currently seven shots over par.
Lee Westwood and Danny Willett are set to kick off their final day at 1.17pm, with the pair eight-under and seven-under, respectively.
Koepka (-9) and Holmes (-10) are expected to follow 10 minutes later, at 1.37pm.
Leaders Fleetwood and Lowry will be taking to the course at 1.47pm.
Full Sunday tee times
7:32am – Ashton Turner
7:42am – Shubhankar Sharma, Kiradech Aphibarnrat
7:52am – Eddie Pepperell, Nino Bertasio
8:02am – Paul Waring, Thorbjorn Olesen
8:12am – Jason Kokrak, Branden Grace
8:22am – Jim Furyk, Callum Shinkwin
8:32am – Kevin Streelman, Bubba Watson
8:42am – Bernd Wiesberger, Kyle Stanley
8:57am – Paul Casey, Benjamin Hebert
9:07am – Adam Hadwin, Matt Wallace
9:17am – Francesco Molinari, Thomas Pieters
9:27am – Louis Oosthuizen, Andrew Wilson
9:37am – Yosuke Asaji, Steward Cink
9:47am – Joost Luiten, Doc Redman
9:57am – Innchoon Hwang, Ryan Fox
10:07am – Yuki Inamori, Charley Hoffman
10:17am – Lucas Bjerregaard, Ernie Els
10:32am – Aaron Wise, Lucas Glover
10:42am – Patrick Cantlay, Sergio Garcia
10:52am – Mikko Korhonen , Dustin Johnson
11:02am – Rory Sabbatini, Robert MacIntyre
11:12am – Romain Langaque, Kevin Kisner
11:22am – Tom Lewis, Graeme McDowell
11:32am – Justin Harding, Erik van Rooyen
11:42am – Tyrrell Hatton, Webb Simpson
11:52am – Byeong Hun-am, Matthew Fitzpatrick
12:07pm – Patrick Reed, Justin Thomas
12:17pm – Sang Hyun-park, Russell Knox
12:27pm – Xander Schauffele, Cameron Smith
12:37pm – Andrew Putnam, Dylan Frittelli
12:47pm – Matt Kuchar, Alex Noren
12:57pm – Henrik Stenson , Jordan Spieth
1:07pm – Tony Finau, Jon Rahm
1:17pm – Danny Willett, Lee Westwood
1:27pm – Rickie Fowler, Justin Rose
1:37pm – Brooks Koepka, JB Holmes
1:47pm – Tommy Fleetwood, Shane Lowry