Jordan Spieth at PGA Championship 2015: Friday Leaderboard Score and Reaction

Jordan Spieth charged up the leaderboard during the second round of the 2015 PGA Championship on Friday. He posted a five-under 67 to reach six under overall, which left him one stroke behind David Lingmerth in a tie for second place with the afternoon wave of play just getting underway.

The 22-year-old American nearly had a Grand Slam opportunity on the line this week. He won the Masters and the U.S. Open, but he came up one stroke short of making the playoff at The Open Championship last month. Three out of four would still be a remarkable season, though.

Let's check out how Spieth's latest trip around Whistling Straits went and an updated look at the tournament leaderboard.

Round 2 Scorecard

Hole	10	11	12	13	14	15	16	17	18	Total
Hole	1	2	3	4	5	6	7	8	9	Total
Par	4	5	3	4	4	4	5	3	4	36
Score	4	4	4	4	4	4	4	3	3	34
Overall	-1	-2	-1	-1	-1	-1	-2	-2	-3	-
Par	4	5	3	4	5	4	3	4	4	36
Score	3	5	2	4	5	3	3	4	4	33
Overall	-4	-4	-5	-5	-5	-6	-6	-6	-6	-

Tournament Leaderboard

Day 2 Recap

Spieth came into the day five strokes off the early pace set by Dustin Johnson. He could only grind out a one-under 71 on Thursday, which he partially blames on the weather.

He noted after the round that he and playing partners Rory McIlroy and Zach Johnson discussed how they didn't have much chance of making up ground on Johnson, who teed off early, as the wind picked up in the afternoon, per Kevin Kaduk of Yahoo Sports.

"When we saw six-under on the board, we talked about it and knew that was probably not feasible for us, minus a few breaks," Spieth said. "It was a different golf course and we needed to adjust our expectations because of that."

Conditions were more favorable early Friday, and Spieth started to make his move.

He actually started the round in pretty mundane fashion. A birdie on the 11th got offset by a bogey on the 12th, and those scores were sandwiched by a quartet of pars.

Then, as if a switch got flipped on the 16th tee, he started playing more like a two-time major champion. He poured in four birdies over the next six holes to vault from outside the top 20 into the top five, exactly the type of run he needed to build some positive vibes.

The best highlight from the stretch came on No. 18, as PGA.com showed:

After he added a second straight birdie on the first hole following the turn, Jason Sobel of ESPN joked about the run toward the top:

Spieth's success comes as no surprise at this point. The fluidity of his swing allows him to drop the ball wherever he wants with a series of clean strikes, and then it's just a matter of if he can get his putter going on the greens.

He added another birdie on the short par-four sixth, hitting his approach just outside of five feet and knocking in the putt. Sally Jenkins of the Washington Post showcased noted Spieth's achievement as he moved into a tie for first:

"

So now Jordan Spieth has had a piece of the lead in all four majors this year.

— Sally Jenkins (@sallyjenx) August 14, 2015"

A trio of pars finished his round, just missing a birdie putt on the ninth, leaving him a single stroke off the lead.

ESPN's Trey Wingo may have summed it up best:

He said the chip on 18 really turned the tide in his favor, per Steve Elling of GolfBlot.com:

Ultimately, a lot of work remains if Spieth is going to collect another major title Sunday. That said, his performance in the second round helped him get back firmly in the mix and should give him an added confidence boost heading into the weekend.

His chances are also helped by the fact that all of the leaders will now play in the same conditions. The only time the course tamed him through two days came when the winds were high, but if his chief rivals are also forced to battle the conditions, there's no disadvantage.

At the very least, it makes Spieth the player to beat unless somebody in the afternoon wave goes super low later Friday.