Under a gorgeous sky Friday, Dustin Johnson, the world’s No. 1 player, shot a 7-under-par 64 and shared the 36-hole lead with Beau Hossler in the AT&T Pebble Beach Pro-Am.
Johnson ran off three straight birdies to start his round, then made four birdies in a five-hole stretch around the turn on the Shore Course at Monterey Peninsula.
‘‘Probably my lowest by about seven shots at Monterey Peninsula, so I was happy with that,’’ Johnson said. ‘‘It’s probably the first time, too, I think we have ever played over there with nice weather. So it was definitely a good day.’’
He only slightly exaggerated, but not by much. In four times playing at Monterey Peninsula since it joined the rotation, he only broke 70 one time and twice shot 73. The evidence of the different day he faced came early. Johnson hit a 9-iron on the 176-yard hole that plays downhill. A year ago, he hit 4-iron. On the 434-yard 13th hole a year ago, he ‘‘roasted’’ a driver and a 3-iron. This year, he hit 3-wood and had 85 yards left.
‘‘But I was right behind the tree,’’ he said.
Hossler, the PGA Tour rookie best known in these parts for contending on the weekend at Olympic Club in 2012 US Open when he was 17, was flawless at Spyglass Hill in a round of 67 to join Johnson at 12 under.
Hossler has not made a bogey this week. He holed an 18-foot par putt on the 10th hole at Pebble Beach on Thursday. For his second round, he never came close to bogey, hitting all but two greens in regulation and having standard chips on those.
Hossler heads over to Monterey Peninsula, while Johnson spends his last two days at Pebble Beach.
They were two shots ahead to par on Julian Suri (67 at Monterey Peninsula) and Troy Merritt (67 at Spyglass Hill).
Lurking another shot behind were Phil Mickelson and Jon Rahm.
Mickelson hasn’t won since the British Open in 2013 at Muirfield, and he finally started to see some reasonable results after a sluggish start this year. Mickelson was tied for the lead at one point when he ran off three straight birdies at Monterey Peninsula, though he made only two more over his final 11 holes for a 65.
Rahm was at Pebble Beach and holed his share of 6-footers for birdie for a 67. Just as big was the 8-foot putt he made on the 18th hole for par when he hit 3-wood to the right behind a tree, pitched nicely under the limbs, and over the bunker just through the green, and then his chip ran downhill by the hole.
Jason Day had a 65 at Monterey Peninsula and was in the group at 9 under that included Steve Stricker (66 at Monterey Peninsula).
Jordan Spieth found some touch with the putter to make five birdies on his opening nine holes at Monterey Peninsula, and he wound up with a 66, though he remained seven shots behind Johnson.
‘‘I saw a couple putts go in early and normally that’s all I need to kind of stop skiing uphill and start to turn downhill,’’ Spieth said.
Rory McIlroy went downhill.
He was hanging round at 5 under, not far from the lead, when he drove to the front of the par-4 fifth hole at Monterey Peninsula, leaving him a 70-foot eagle putt. He ran that about 6 feet past the hole, and then missed his birdie putt. But then he missed his par putt from 3 feet, and it ran about 6 feet by the hole, and he missed that one. That’s five putts for a double bogey, and two more bogeys led to a 74 and left him in danger of missing the cut.
Hossler, who played at Texas, is part of the new generation who thought they could take on the best from when they were in college. He’s not one to be intimidated by the world’s No. 1 player (they are represented by the same manager), and that won’t be an issue on Saturday, anyway.
Johnson is part of the celebrity rotation at Pebble Beach. Hossler figures to be in relative solitude at Monterey Peninsula.
‘‘I try and not let those things affect me,’’ Hossler said. ‘‘But yeah, playing on a moving day-type day, not at the home track for the tournament, that’s certainly different really most weeks out here.’’
Johnson was full of good news Friday — his 64 for a share of the lead as he goes for a third victory at Pebble Beach, and he found out that his dad bowled a 300. The world’s No. 1 golfer grew up with bowling and said he once had a chance at a perfect game.
‘‘I bowled 11 in a row,’’ he said, breaking into a smile, ‘‘and then I gassed it.’’
European — Lee Westwood was tied for the lead with defending champion Brett Rumford after two rounds of the World Super 6 at Lake Karrinyup Country Club in Perth, Australia .
Rumford, who led by two strokes after the opening round, shot a par 72. Westwood had a 70 to move into the tie, with four other golfers a stroke behind.
Westwood and Rumford had 36-hole totals of 8-under 136.
The top 24 after three rounds play six-hole shootouts in the event co-sanctioned by three tours: European, Asian, and PGA of Australia.
Westwood said his main priority was to finish in the top 24, rather than put pressure on himself to get a top-eight seeding.
‘‘You’re going to need a lot of luck,’’ he said. ‘‘It’s exciting for the fans and the format of the game. Golf needs something like that.’’
Andrew (Beef) Johnston shot 73-76 to be 4 over, and missed the cut, which was par. He was a late replacement for fellow Englishman Tyrrell Hatton, who was the highest-ranked player in the field at No. 15 before withdrawing with a wrist injury.
Also missing the cut was another Englishman, Danny Willett, the 2016 Masters champion, who shot rounds of 76-75 to be 7 over.
Champions — Mark Calcavecchia shot an 8-under 64 to take the first-round lead in the Boca Raton Championship, the tour’s first full-field event of the season.
The 57-year-old Calcavecchia birdied seven of his first 10 holes and added another on the par-4 seventh at The Old Course at Broken Sound.
‘‘It was, for 10 holes, a spectacular putting exhibition,’’ Calcavecchia said. ‘‘I didn’t miss, literally, which was nice. And then I lipped one out on 2, which was my 11th hole, and then really never made another one. Kind of lipped one out on 8 about 6 feet. Hit a beautiful shot in there.’’
Calcavecchia won the last of his three senior titles in 2015. He won the 1989 British Open for one of his 13 PGA Tour titles.
‘‘I could have hit a few more fairways, but some of these fairways aren’t that easy to hit, so really good day,’’ Calcavecchia said. ‘‘I knew I was playing pretty good coming in. Been feeling pretty good, playing a lot of golf. Great start, obviously.’’
Rocco Mediate and Jeff Maggert were a stroke back. Mediate eagled the seventh, hitting a 3-wood to 30 feet, but closed with a bogey on the par-4 ninth.
Bernhard Langer, the 2010 winner in his home event, was at 66 with Fred Funk and Jesper Parnevik. The 60-year-old Langer won seven times, three of them majors, last season.
John Daly, playing alongside Langer, was another stroke back with 2014 champion Michael Allen, 2015 winner Paul Goydos, Steve Flesch, Duffy Waldorf, Kirk Triplett, Jerry Smith, and Kent Jones.