Koepka extends lead to 7 after Round 2 at Bethpage Black
Stuart Franklin / Getty Images Sport / Getty

Brooks Koepka didn't let off the gas in Round 2 of the PGA Championship, firing a 5-under 65 on Friday to extend his lead to a whopping seven shots at 12-under.

The defending champion birdied three of his first four holes to pull away early. His first bogey of the tournament came on the 10th, but he played his final eight holes at 3-under to continue extending his lead.

Koepka becomes the first player ever to lead a major championship by seven shots after 36 holes. His total of 128 also set the record for the lowest total after two rounds at a major.

Jordan Spieth and Adam Scott lead the chasing pack. They have plenty of work to do, sitting at 5-under par.

Here's how the top of the leaderboard looks after 36 holes:

Place Player Total to par Round 2 score
1 Brooks Koepka -12 65
T2 Jordan Spieth -5 66
T2 Adam Scott -5 64
T4 Daniel Berger -4 66
T4 Dustin Johnson -4 67
T4 Kelly Kraft -4 65
T4 Matt Wallace -4 67
T4 Luke List -4 68
9 Justin Rose -3 67

Tommy Fleetwood fell off the pace on the back nine. He was 6-under on the 12th tee before bogeying four of his final seven holes to drop back into a tie for 10th alongside Rickie Fowler, Hideki Matsuyama, and Louis Oosthuizen.

Phil Mickelson, Matt Kuchar, and Francesco Molinari are at even par, which is good for a tie for 26th.

Rory McIlroy birdied four holes on the back nine to battle back inside the cutline. He's in a tie for 57th at 3-over. Jason Day joins McIlroy at 3-over after a disappointing 74.

Koepka extends lead to 7 after Round 2 at Bethpage Black
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