After a second straight six-under 66, Byeong Hun An edged clear at the Sanderson Farms Championship.
World number two Rory McIlroy left himself with no room for error on Friday at Wentworth, moving just above the cut line.
Tom Hoge carded a 64 for a one-stroke lead in Jackson, Mississippi, where severe storms forced play to be suspended on Thursday.
While Rory McIlroy struggled in his first round, Matt Wallace dazzled in familiar surroundings to lead by one at Wentworth.
A return of the skins format will see Tiger Woods, Rory McIlroy, Jason Day and Hideki Matsuyama face off in Japan next month.
Robert Karlsson has been picked as first vice-captain for the second successive Ryder Cup.
Joaquin Niemann, 20, joined elite company with his first PGA Tour win at the Greenbrier Classic.
Two-time major champion Suzann Pettersen's final shot as a professional clinched Solheim Cup glory as she later retired.
Captain's pick Suzann Pettersen proved to be the 2019 Solheim Cup hero as she led Europe to a dramatic victory in Scotland.
Callum Shinkwin missed out on a first European Tour title in Amsterdam as Sergio Garcia instead took his 16th.