Tiger Woods plans to withdraw from this week's Safeway Open

— -- NAPA, Calif. -- Tiger Woods' return to competitive golf has been put on hold, a source told ESPN.com on Monday.

A spokesman for Woods said an official announcement was forthcoming.

Woods, who was set to play at this week's Safeway Open -- his first tournament in more than 14 months -- abruptly decided against competing in the first PGA Tour event of the 2016-17 season.

Woods, 40, was taking part in a pro-am event at Pebble Beach that benefits the Tiger Woods Foundation. Woods was not playing in the event, but participating as a host and conducting clinics. He attended the Washington State-Stanford college football game on Saturday, about two hours from Silverado Resort.

On Sept. 7, Woods announced that he "hoped'' to play the Safeway, as well as next month's Turkish Airlines Open and December's Hero World Challenge. He has not played since the 2015 Wyndham Championship, where he tied for 10th before undergoing two back procedures late last year.

Woods has fallen to 786th in the world.