Scott Piercy led a dominant American leaderboard at the PGA Tour’s CJ Cup at Nine Bridges on Friday with a 7-under 65 to take a one-stroke lead after two rounds.

Piercy had a 36-hole total of 9-under 135, one ahead of Brooks Koepka, who also shot 65 and is playing in his first tournament since being voted PGA Tour player of the year.

Justin Thomas of the United States watches his shot on the 10th hole during the first round of the CJ Cup PGA golf tournament at Nine Bridges on Jeju Island, South Korea, Thursday, Oct. 18, 2018. (Park Ji-ho/Yonhap via AP)

Fellow American Chez Reavie, who led by one stroke after the first round, was in third, three strokes behind Piercy.

Marc Leishman of Australia watches his shot on the first hole during the first round of the CJ Cup PGA golf tournament at Nine Bridges on Jeju Island, South Korea, Thursday, Oct. 18, 2018. (Park Ji-ho/Yonhap via AP)

Sweden’s Alex Noren (65) and Ian Poulter (69) of England were tied for fourth, four behind.

Hideki Matsuyama of Japan lines up his putt on the first green during the first round of the CJ Cup PGA golf tournament at Nine Bridges on Jeju Island, South Korea, Thursday, Oct. 18, 2018. (Park Ji-ho/Yonhap via AP)

Five Americans — Brian Harman with a round-of-the-day 64, Ryan Armour and Gary Woodland (67s) and Jamie Lovemark and Pat Perez (68s) — were tied for sixth, five strokes behind Piercy.

Justin Thomas of the United States blasts a shot on the 10th hole during the first round of the CJ Cup PGA golf tournament at Nine Bridges on Jeju Island, South Korea, Thursday, Oct. 18, 2018. (Park Ji-ho/Yonhap via AP)

Defending champion Justin Thomas shot 70 and was eight shots off the lead at 1-under.

Hideki Matsuyama of Japan watches his shot on the first hole during the first round of the CJ Cup PGA golf tournament at Nine Bridges on Jeju Island, South Korea, Thursday, Oct. 18, 2018. (Park Ji-ho/Yonhap via AP)

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Source: The Associated Press