PGA Championship 2016: Leaderboard Scores, Highlights and Cut Line from Friday

Jimmy Walker and Robert Streb are setting the pace through 36 holes at the 2016 PGA Championship at Baltusrol Golf Club in Springfield, New Jersey.

Both golfers are at nine under following Friday's second round. Emiliano Grillo and Jason Day are tied for second at seven under.

Streb finished with a seven-under 63 for the round, which tied for the lowest single-round score at a major tournament. PGA.com shared a replay of his birdie putt on No. 9 to conclude his second round:

While Streb's performance was impressive, PGATour.com's Sean Martin added a little more perspective:

The 29-year-old was consistent across the board Friday. He reached 11-of-14 fairways off the tee and 14-of-18 greens in regulation, and he also gained 2.119 strokes with his putter.

Walker couldn't quite match Streb in terms of single-round output, but he didn't have as much work to do following his four-under 66 in the first round. Walker was consistent without making too many mistakes. He carded two birdies on the front nine and three more on the back nine before closing out the round with a bogey on No. 18.

As Golf Channel researcher Justin Ray noted, both Streb and Walker were extremely close to making even more history:

Day had an unremarkable start to his PGA Championship, shooting two under in the first round. He's firmly in contention now after shooting a five-under 65 on Friday. The reigning champion is in a great position to go back to back through two rounds of this year's tournament.

Day struggled on the front nine, bogeying No. 3 and double-bogeying No. 7. Then, he birdied five of his first six holes on the back nine. CBSSports.com's Robby Kalland joked Day set Baltusrol ablaze with his hot streak:

The PGA Tour provided a replay of Day's 37-foot birdie putt on No. 14:

The 28-year-old also produced the moment of the tournament so far, low-fiving a young golf fan, which the PGA Tour shared on Twitter:

Only the top 70 golfers will continue playing through the weekend. The two-over cut line claimed a few notable stars, including U.S. Open champion Dustin Johnson.

His failure to make the cut was a major surprise considering he had finished in the top 10 in each of the first three major tournaments this year. He had also made the cut in his last 25 events, which was the highest active streak on the PGA Tour, per ESPN Stats & Info.

An opening-round 77 largely sealed Johnson's fate at Baltusrol, and a second-round 72 was the final nail in the coffin. Bet365 was among those surprised to see the 32-year-old play so poorly:

Rory McIlroy's PGA Championship also ended prematurely after he shot three over through the first two rounds. He only needed a par on his final hole to ensure passage to Saturday and Sunday. Instead, he bogeyed No. 18 to fall one shot behind the cut line. Ray noted how McIlroy's game melted down once he approached the green on Thursday and Friday:

U.S. Open runner-up Shane Lowry, Sergio Garcia, Matt Kuchar and Graeme McDowell were among the others who failed to make the cut. The Guardian's Ewan Murray was particularly displeased to see Lowry miss out:

With the 2016 PGA Championship reaching the halfway mark, Day will likely be many fans' favorite to win. While he has to make up some ground on Walker and Streb, two shots isn't a significant enough that he couldn't close it by the end of the third round.

2010 PGA champion Martin Kaymer and Patrick Reed are only four shots back of the leaders at five under, while 2016 British Open champion Henrik Stenson is at six under.

Walker and Streb will have a fight on their hands as they look to maintain the top spot Saturday.

Post-Round Reaction

Day explained his poor play on the front nine spurred him on to his hot streak on the back nine, per Kalland:

"

I kind of gave myself a little bit of a kick in the bum, especially with the double bogey on 7. It was a bit of a mess there. With that said, being able to come back and birdie 8 and 9 really made things a lot better for me on the back side. Just kept on setting myself up for opportunities. Even when I was kind of out of position, either in a fairway bunker or just in the rough, I had perfect angles. So that was quite nice. It was pretty receptive out there today. I think if you could be a little bit aggressive, but also play it safe on some of the holes that you needed to. If you had the putter rolling you could get a score going. Fortunately for me, the back side was nice.

"

"My tee to green game, there's not much wrong with that. It's pretty solid," McIlroy said as he assessed his performance, per BBC Sport. "If you had given anyone else in this field my tee shots this week, they would have been up near the top of the leaderboard. It just shows you how bad I was around the greens."

When discussing how he played, Johnson denied fatigue played any role in him missing the cut, per Hank Gola of NJ Advance Media: "No, I just played (crappy). It happens. I had a pretty good stretch here for the past six months, I feel like I played really well. I just played bad."

Note: Stats are courtesy of PGATour.com.