Phil Mickelson hit every fairway for the first time in 21 years on his way to a 6-under 65 at Monterey Peninsula, an ideal start Thursday on perhaps the last ideal day at the AT&T Pebble Beach Pro-Am.

Brian Gay and Scott Langley each had a 64 at Monterey for a one-shot lead to par on the three-course rotation Thursday.

Dustin Johnson, not so fresh after his victory Sunday halfway around the world at the Saudi International, and Jordan Spieth each had a 5-under 66 at Monterey.

There was no shortage of activity with Brandt Snedeker making birdie from the beach at Pebble Beach and Keith Mitchell saving par with a left-handed shot off a bridge while playing with PGA Tour Commissioner Jay Monahan.

Most unusual was Mickelson avoiding the rough.

Phil Mickelson hits his approach shot from the second fairway of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Phil Mickelson hits his approach shot from the second fairway of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Wayne Gretzky, right, reacts after missing a putt as Dustin Johnson watches on the second green of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Wayne Gretzky, right, reacts after missing a putt as Dustin Johnson watches on the second green of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Dustin Johnson hits from the first tee of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Dustin Johnson hits from the first tee of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Brian Gay follows his drive from the 13th tee of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Brian Gay follows his drive from the 13th tee of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Ho-Sung Choi, of South Korea, follows his drive from the 17th tee of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Ho-Sung Choi, of South Korea, follows his drive from the 17th tee of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Larry Fitzgerald Jr., right, follows his drive from the 13th tee of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)
Larry Fitzgerald Jr., right, follows his drive from the 13th tee of the Monterey Peninsula Country Club Shore Course during the first round of the AT&T Pebble Beach National Pro-Am golf tournament Thursday, Feb. (AP Photo/Eric Risberg)