Tiger Woods still within reach of a win?

Well, there's 36 holes down at Pebble Beach and 36 to go after Friday's second round. Charlie Wi, who has yet to win on the PGA Tour, owns the lead, but it'll be a tall order for him to keep it that way come Saturday night.

So what should we expect over the final two rounds of the AT&T Pebble Beach National Pro-Am? Our scribes on site in California tackle the serious -- and not-so-serious -- topics of the day.

1. Going into the weekend, who's the player to beat on the leaderboard?

Bob Harig, ESPN.com senior golf writer: Dustin Johnson. The two-time winner at Pebble Beach is 3 strokes behind tournament leader Charlie Wi but gets to play the easiest of the three venues, Monterey Peninsula, on Saturday. That gives him a big advantage.

Ron Kroichick, San Francisco Chronicle golf writer: Charlie Wi still has to play Spyglass Hill, plus he has a history of struggling to seal the deal (16 top-10 finishes but no wins in 162 PGA Tour starts). So we'll say two-time AT&T champion Dustin Johnson, who gets a crack at Monterey Peninsula on Saturday -- with an early tee time, before the greens are full of spike marks.

Sarah Turcotte, ESPN The Magazine senior writer: Well, obviously Charlie Wi is the man to beat right now, but I'd feel pretty good if I were Dustin Johnson. Wi has yet to play Spyglass, and Johnson gets the easiest course, MPCC, with an early tee time tomorrow. Johnson's experience and acumen at Pebble have to make him the favorite.

Gene Wojciechowski, ESPN.com senior national columnist: Nothing against Vijay Singh, Phil Mickelson and Padraig Harrington -- all on the leaderboard -- but I'm going with Dustin Johnson. DJ won here in 2009 and 2010. That counts for something, right?

2. How many shots off the lead can Tiger Woods be heading into Sunday to have a legitimate shot to win?

Bob Harig: It is more about how many players are between him and the lead. Not only is he 6 shots back, but there are 16 players in front of him. Four strokes with only a handful of players to pass is more realistic.

Ron Kroichick: No more than four. The bigger issue: He can't begin the final round with more than five or six players to pass. Woods begins Saturday's third round tied for 17th, so he needs to make a move at Pebble Beach.

Sarah Turcotte: It depends on who he's chasing. If it's Wi alone ahead, he could be 4 shots off. If it's Johnson or Hunter Mahan, anything more than a stroke could be hard to overcome.

Gene Wojciechowski: Five or six, tops. The thing is, I'm not sure he'll be that close going into Sunday. He has A LOT of work to do at Pebble on Saturday.

3. What kept Tiger from taking advantage of MPCC in Round 2?

Bob Harig: Putting. He had 33 putts. And while he bemoaned not hitting it close enough, he also had several good opportunities get away from him from inside 10 feet.

Ron Kroichick: The weather and his iron play. Woods acknowledged he left himself above the hole too often, leading to slick putts on which he couldn't be aggressive. Staying below the hole is even more vital at Pebble Beach.

Sarah Turcotte: He's just not capitalizing on opportunities. Making a par when he should make birdie on the much easier Monterey Peninsula Country Club is almost like dropping two shots to the field. That's two days in a row that he could have gone very low and didn't. He has two more days to make up for that.

Gene Wojciechowski: According to Tiger, it was his placement of approach shots on the greens. He and his caddie, Joe LaCava, said he actually putted well Friday. But he didn't give himself enough chances to go low.

4. To get away from the golf a bit -- give us your best celebrity sighting so far this week.

Bob Harig: Does Chris Berman count? You have to go with Bill Murray, who still attracts the masses and hasn't disappointed so far.

Ron Kroichick: Fans at Spyglass on Thursday were clamoring for Fergie -- lead singer of The Black Eyed Peas and husband of actor/amateur golfer Josh Duhamel -- to come over and sign autographs. Tour pro Chris DiMarco, camera in hand, finally looked over and said, "Calm down. I get a picture first."

Sarah Turcotte: Fergie was the most entertaining. She was all smiles following husband Josh Duhamel even though she was wearing impractical heels and desperate to find a ladies room. After the round, Chris DiMarco pulled rank and got his picture with the singer before she signed 8x10 photos for fans. The best part was the other writers outside the scoring trailer who had no idea who she was. They were scrambling to figure out who the blonde with Bob Estes' partner was.

Gene Wojciechowski: Does Bob Harig count as a celebrity? Didn't think so. I saw Andy Garcia at Spyglass. He looked at me as if I were a security guard or volunteer marshal.