Dustin Johnson is the new world number one following his victory at the Genesis Open in California.
Padraig Harrington is just three shots off the lead held by Sam Saunders following the first round of the Genesis Open in California.
Tiger Woods has been "advised by doctors to limit all activities" as he tries to recover from the back spasms which forced him out of this week's Genesis Open.
Tiger Woods has withdrawn from next week's Genesis Open and the Honda Classic a fortnight later as he struggles with "ongoing back spasms".
Shane Lowry and Seamus Power both made fine starts to a rain-affected first day at the AT&T Pebble Beach Pro-Am.