What have we learned so far? Well, a few things …

• Tiger is a good tipper.

On Wednesday, Woods and O’Hair played a practice round together, with TW offering some putting advice to his buddy. One day later, O’Hair parlayed that tip into an opening-round 4-under 66 to claim sole possession of the lead.

• Woods and Harrington are on the clock.

OK, maybe not officially, but you know everyone will be keeping a close eye on their watches as these guys are paired once again six weeks after being put on the clock with three holes to play at Firestone. Remember, though: They played together three times the next week at Hazeltine without issue, so don’t expect any major controversy today.

• Is there a home-course advantage?

No competitor knows East Lake like Stewart Cink, and he parlayed that course knowledge into a 3-under 67 on Thursday. He’ll be trying to keep it going with plenty of hometown folks rooting him on from the gallery.

• Phil pulls a quad.

Phil Mickelson played 17 holes in 1-under yesterday, but a quadruple-bogey on No. 14 dropped him into a share of 26th place by day’s end. Yes, he can get back into this tournament, but it’s going to take a low number today.

It’s Friday! Time to start Happy Hour early and stick right here with the Live Blog all day. I’ll be your guide from first tee shot to final putt, so don’t go anywhere. And as always, questions and comments can be added here on the page or via Twitter at JasonSobel. Should be a fun one. You may now swing away …

For most of us, when we get some time off we play golf.

For professional golfers, they do anything but play golf.

Unless their name is Sean O'Hair. Fun stuff from the tourney leader after yesterday's round:

Q. How much golf did you play last week?
SEAN O'HAIR: I played six days in a row.

Q: Nice vacation, huh?
SEAN O'HAIR: Yeah, it was a good week off. Yeah, just played with my buddies, and we just had a good time. Did a lot of gambling and lost a lot of money. I lost a lot of money last week, but that's okay.

Q: I thought you were good.
SEAN O'HAIR: Yeah, I was giving them too many shots. They were winning the bets on the first tee.

Q: What did you play, Aronimink the whole time or bounce around?
SEAN O'HAIR: I played Aronimink, Kennett Country Club, I played Concord Country Club, and I think that was about it, yeah.

Q: Everyone was talking about needing a break. Why did you do this?
SEAN O'HAIR: I just felt like playing. I didn't go out and beat balls, I didn't go out on the putting green and putt. Really I got in my car, threw my clubs on the cart, and away we went. That was about it. It was a good time. We'd go have lunch afterwards or before we'd play and shoot the breeze a little bit. You know, I'm fortunate enough that my buddies, they are self-employed so they can take the time off through the week and go play a little bit. So it was fun.

Q: Sounds like you put them into early retirement with the money, right?
SEAN O'HAIR: I've taken a lot of money off them, so it's just kind of evening out. But I'm still up.

I've migrated out to the first tee, where Jim Furyk and Kevin Na are about to tee off.

Another perfect day here at East Lake, with some puffy white clouds in the sky and a little less humidity than yesterday.

Might need to enjoy it while it lasts, though. Another storm is supposed to be coming through here tomorrow. That's bad news for a place that doesn't need any more rain.