Watch Alejandro Tosti drive the green on the par-four 13th hole
This thing got smacked 338 yards and landed six feet from the hole, which he rolled in for an eagle
Koepka rolls in another birdie to move to six-under
Par-birdie-par-birdie is the start for Koepka
Notable tee times this afternoon
12:15 - Scottie Scheffler / Mark Hubbard
12:45 - Rory McIlroy / Tom Kim
1:05 - Keegan Bradley / Taylor Moore
1:35 - Tony Finau / Justin Thomas
2:15 - Bryson DeChambeau / Viktor Hovland
2:25 - Shane Lowry / Sahith Theegala
2:35 - Collin Morikawa / Xander Schauffele
Koepka birdies the second to move up to five-under
Last year's champion will need about ten more of those to catch up to Schauffele and Morikawa.
Here's what they're all fighting for
It's the largest prize in golf - the Wannamaker Trophy
Strongest start of the day goes to Sebastian Soderberg
The Swede had three birdies on the front nine and started the back with another birdie for a four-under day
Brooks Koepka tees off on his final round
The reigning PGA Champion will likely not be retaining his title as he sits eleven shots behind the leaders.
Early big movers: Andrew Putnam, Sebastian Soderberg, Jordan Smith, and Dustin Johnson among others
None of these four will be in contention, but nevertheless they're doing a good job moving their way up the leaderboard.
We've got wildlife to watch in the early tee times
A bale of turtles are seen taking in the sunshine while a little spider decided to explore the camera lens on the fourth hole
Here's a little refresher on the leaderboard, if you are just catching up
T1 (-15): Collin Morikawa, Xander Schauffele
3 (-14): Sahith Theegala
T4 (-13): Shane Lowry, Viktor Hovland, Bryson DeChambeau
T7 (-12): Justin Rose, Robert MacIntyre
9 (-11): Dean Burmester
T10 (-10): Lee Hodges, Justin Thomas, Harris English, Austin Eckroat, Tony Finau, Thomas Detry
There are 13 golfers who are within five shots of the leaders
It should set up today as an incredibly close affair with multiple golfers in the fight for the Wannamaker Trophy
Good morning! And welcome to DailyMail.com's live coverage of the final round of the PGA Championship
Get ready for what should be an exciting final day of action from Valhalla Golf Club in Kentucky.