Hideki Matsuyama grabbed the lead at The Players Championship after tying a course record.
American Patrick Reed produced a fine finish to win the WGC-Mexico Championship.
Jon Rahm fired a spectacular 61 on Saturday at the WGC-Mexico Championship, but Justin Thomas sits on top of the leaderboard.
American golfer Bryson DeChambeau sits atop the leaderboard after two rounds in Mexico.
Runner-up last year, Rory McIlroy grabbed a first-round lead at the WGC-Mexico Championship.
American golfer Matt Kuchar set the pace in California on Thursday.
Webb Simpson had not won a PGA Tour trophy since capturing his fifth piece of silverware via The Players Championship in 2018.
Brendan Steele and Cameron Davis lead the Sony Open in Hawaii as several big names missed the cut.
Collin Morikawa, 22, carded a flawless five-under-par 65 to top the leaderboard at Waialae Country Club in Honolulu on Thursday.
After a third play-off hole, Justin Thomas clinched the Tournament of Champions title.