Tiger Woods and Vijay Singh — It goes without saying that this is the pairing to watch on Saturday. Tied for the lead at 4-under, both players have a chance to make history this weekend -- Woods is going for his 15th major championship and Singh is trying to become the oldest major winner in golf history at 49 -- but keep an eye on how much they interact during the round. If you'll recall, Singh's caddie Paul Tesori wore a hat that had "Tiger Who?" taped to the back during the 2000 Presidents Cup. Woods went on to win the match, 2 and 1, but ever since that fateful day, the relationship between the two players has been, shall we say, chilly. Don't expect a lot of chitchat.

The weather at the Ocean Course — One day after players battled 20-30 mph winds at the Ocean Course and the stroke averaged hovered around 78, players will once again want to keep one eye on the course and the other on the Doppler. With winds expected to top out at around 15 mph, we likely won't see a repeat of Friday's carnage. That doesn't mean players can go birdie hunting, but there's a good possibility we could see a few more rounds on the 60s today. Also, there's a 40 percent chance of thunderstorms today, which means an afternoon delay isn't out of the realm of possibility.

Phil Mickelson lurking on the weekend — Mickelson said after the first round that if he was within four shots of the lead going into the weekend, he liked his chances. Well, when he tees it up on Saturday at the PGA Championship, he'll be exactly four shots back of the leaders. He's not exactly playing at an incredibly high level -- he's been scrambling for his life to stay in the tournament -- but if he can continue to grind and hang around the front page of the leaderboard going into the final round ... you never know.