Canadian Nick Taylor tops the leaderboard at the halfway stage of the PGA Tour tournament.
Canadian golfer and one-time PGA Tour winner Nick Taylor carded a bogey-free eight-under-par 63 in California.
Byeong Hun An has replaced Jason Day in the International Team for the Presidents Cup, after the Australian suffered a back injury.
International captain Ernie Els named his four picks for next month's Presidents Cup.
American superstar Tiger Woods dazzled on day one of the PGA Tour tournament in Japan, once he recovered from a shaky start.
American star Justin Thomas used a bogey-free second round to surge to the top of the CJ Cup leaderboard.
Defending champion and world number one Brooks Koepka had a tricky opening to the CJ Cup in South Korea, as An Byeong-hun surged clear.
A return of the skins format will see Tiger Woods, Rory McIlroy, Jason Day and Hideki Matsuyama face off in Japan next month.
Steve Williams is often credited as golf's most successful caddie, but former world number one Jason Day has split with the New Zealander.
A birdie at the last saw Bryson DeChambeau join Matthew Wolff and Collin Morikawa atop the leaderboard in Minnesota on Saturday.