PEBBLE BEACH, Calif. — Jordan Spieth knew the pin position on the ninth hole at Spyglass Hill as much by memory as by sight, which was a good thing considering the fog creeping across the Monterey Peninsula on Friday.

The crowd behind the green couldn't see Spieth, only a golf ball that landed behind the flag and spun back 3 feet below the cup. Spieth tapped that in for his eighth birdie of the round and a 7-under 65 that put him atop the leaderboard in the AT&T Pebble Beach Pro-Am.

Spieth was at 10-under 133.

Derek Fathauer was 8 under for his round at Pebble Beach and tied with Spieth at 10 under. Fathauer had to return Saturday morning to finish his round on the ninth hole. The bigger threat might be Jason Day, the world's No. 1 player, who was 7 under through 12 holes at Spyglass when play was stopped. Day was at 9 under.

Patrick Reed was at 7 under and had one hole to play at Monterey Peninsula.

Spieth mainly was thrilled that he finished just before the horn sounded to suspend play again, this time for fog.

It's hard to know where anyone stands until three rounds are completed, let alone when only 33 out of 154 players were done with the second round. Spieth only knew that his swing was dialed in and his putter — the most dangerous club in his bag — was coming around.

"I didn't feel any nerves out there, even though I knew I was toward the lead, just because so much could happen with three courses," he said. "The first two rounds, it's been easy. Tomorrow might feel a little different. But in my opinion, I'm at 10 under now. If I can try and just make two (birdies) a side at Pebble Beach each time, and make up for the bogeys with maybe another birdie, it may be good enough."

The sun, rarely seen this week, is supposed to be make an appearance this weekend. Spieth and Day will play Pebble the final two rounds, and it typically is the easiest when the weather is benign.

What helped Spieth was going off in the third group at Spyglass and having what he considers the best greens on the rotation.

He picked up birdies on both par 3s on the back nine, had a two-putt birdie on a par 5 and made the turn in 4 under to take the lead. Then, he started to get hot with the putter. Spieth rolled in a 12-footer on No. 2, a 25-footer on No. 4 and he saved par with a 15-footer after finding a bunker on the par-3 fifth.

CHAMPIONS: At Boca Raton, Fla., Olin Browne had eight birdies in a nine-hole stretch and shot a 9-under 63 to take the first-round lead in the PGA Champions Tour's Allianz Championship.

Browne birdied Nos. 17-2 and 4-7 on The Old Course at Broken Sound Club in the round that began on No. 10. He birdied all four par-5 holes in the bogey-free round.

Kenny Perry was two strokes back. He opened with an eagle on the par-5 first.

Fred Couples eagled the par-5 11th in a 68. He's playing in Florida for the first time since the 2006 Honda Classic. At age 71, Hale Irwin shot a 68 to better his age for the 19th time on the tour.

Bernhard Langer had a 71, making a double bogey on the par-4 ninth. The 59-year-old German star is coming off a victory in the season-opener in Hawaii, his 30th career victory on the senior tour.