KIAWAH ISLAND — Major champions Brooks Koepka, Hideki Matsuyama and Bryson DeChambeau have all come alive at the PGA Championship.
Koepka, who's won four majors including two PGA titles, has two eagles Friday to join Louis Oosthuizen in the lead at 6-under par in Friday's second round.
Masters champion Matsuyama had four birdies in a six-hole stretch to move up to 3-under par, three behind the leaders.
And DeChambeau has three birdies through 12 holes to join Matsuyama three shots back as they near the end of the round.
Louis Oosthuizen moved in front at the PGA Championship on Friday.
Oosthuizen birdied the 11th and 12th holes to go to 6 under, one shot ahead of Phil Mickelson.
Oosthuizen still has six holes remaining on the Ocean Course's demanding back nine. Still, the South African seems to thrive in the biggest events.
Along with his British Open title in 2010, Oosthuizen has finished second in all four major tournaments, including tying for second in this one behind Justin Thomas in 2017.
Cameron Tringale was the latest contender at the PGA Championship stung by the Ocean Course.
Tringale was at 3-under par and just two shots off the lead early in his second round. That's when he began a five-hole stretch of futility, where he dropped 13 shots and way out of the mix for the major title.
The run began with a triple bogey on No. 14, picked up steam with a quintuple bogey on No. 16, followed by a quadruple bogey on No. 17.
By the time Tringale tapped in for bogey on the 18th hole, he was at 10-over par and way off the cut line.
Tringale struggled the most with the par-5 16th, where he put his tee shot in the water, took a penalty stroke and then put his next shot in the water, leading to a 10.
Things didn't get any better on the treacherous par-3 17th, where Tringale put that tee shot in the water on the way to a 7.
Y.E. Yang, the 2009 PGA Championship winner, was disqualified from this year's event for signing an incorrect scorecard after the second round at the Ocean Course.
A tournament statement said Yang signed for a par on the 10th hole when he actually made a bogey 5. Yang stood at 14-over par through 36 holes and would not have made the cut.
Yang, who is from South Korea, famously rallied on the final day of this tournament 12 years ago to overtake Tiger Woods for his only major title.
Phil Mickelson used another late-round rally to climb up the leaderboard after he appeared to be fading in the second round at the Ocean Course on Friday.
Mickelson made three bogeys on his first nine holes to fall back. But the 50-year-old, five-time major champion made five birdies on his last nine holes to move back up the leaderboard at 5-under par with a 69.
And when leader Branden Grace collapsed with a double-bogey, bogey finish to his second round, it was Mickelson alone in front with a two-shot lead.
Mickelson is seeking his second career PGA Championship title and his first major since the 2013 British Open.
The afternoon wave of competitors, which include two-time PGA winner Brooks Koepka at 3 under, are just starting their second rounds.
Young Englishman Sam Horsfield was a surprise at the PGA Championship with an opening 69, finishing two shots off the lead in his first-ever round at the major.
But on Friday, the wind and pressure at the Ocean Course got to the 24-year-old Horsfield, who shot an 8-over 80 and certainly will miss the cut.
Horsfield's second round included eight bogeys and a double-bogey 6 on the sixth hole. He needed an 18-foot putt to stay in the 70s, but he sent it past he cup to settle for a final bogey.
It was a quick, decisive fall for a player who had won twice on the European Tour in 2020. Then again, that's what Pete Dye's challenging layout can do to almost any competitor.