Piercy surged to the top of the leaderboard with a magnificent seven-under 65 at Nine Bridges.
Other players in the field this week include holder Justin Thomas, CIMB Classic victor Marc Leishman, Brooks Koepka who won two major championships this year, Jason Day, Billy Horschel, Brandt Snedeker, Xander Schauffele and Adam Scott. Last year, the wind blew steadily for three of the four rounds, and can blow enough to affect balls on the greens. I mean, I guess you can call it like caveman golf.
Chez Reavie held the outright lead for much of the second day until back-to-back bogeys at 15 and 16 brought him back to the pack, although he did claw one shot back at the 18th to return a 70 which kept him one ahead of Poulter and Noren.
Koepka's only bogey was on the par-5 ninth hole, where he hit a wayward tee shot.
That was his only dropped shot of the day.
Katie Taylor Retains Titles In Dominant Win Over Cindy Serrano
Serrano tweeted after Taylor's win over her sister: "Congrats to Katie Taylor for her win tonight against my sister Cindy". I would still love to fight a champion because I know Katie is about legacy.
Arsenal defender Shkodran Mustafi: This is why Gunners beat Leicester
The victory was Arsenal's 10th on the bounce, a fitting number for the star of the show, the Gunners No 10, Mesut Ozil . Arsenal now have wins in 10 consecutive games in all competitions for the first time since 12 in 2007.
Ham radio volunteers needed in aftermath of Hurricane Michael
The storm also killed 10 people in Georgia, North Carolina and Virginia, where most were caught in flash flooding. The number of victims of hurricane Michael in the United States has grown to 36 people.
"I've done two tours for a couple of years, and it's very hard", said Willett, whose 3-under 69 Thursday featured five birdies, including four in his final six holes of the front nine.
"Obviously, the wind was down a little bit and from a little bit different direction, so 10 miles an hour wind versus 20s is quite a big difference", said Piercy, who is looking for his first PGA Tour win since the Barbasol Championship in July 2015. He deftly converted the eagle effort to tie Piercy and earn a spot in Saturday's final twosome.
Two more at the ninth and 12th gave him a clear lead at four-under but the world number 342 lipped out with a straightforward par putt at the 13th and he had to settle for a share of second with local Kim Si-woo after signing for a 69. He has played 231 events since that lone win.
Koepka has officially won four PGA Tour events, but three of those are majors (2017, '18 U.S. Open; 2018 PGA). I'm not used to playing in cold conditions and I was just trying to keep my hands warm the whole day.
'I putted well in the majors but overall it wasn't my best putting season, ' he added. I felt like I probably could have shot about 7, 8 under on the front side there, missed a couple. On Thanksgiving weekend, Tiger Woods and Phil Mickelson will face off in a $9 million winner-take-all competition to appeal to a broader range of golf fans. Thomas is 1 under and T22 at the halfway point. He shot 2-under 70 in the second round and is seven shots off the lead.