Big question heading into the weekend at the PGA

There are lots of good stories developing at the PGA Championship, as everyone on this leaderboard could be an interesting champion. Here are just a few questions racing in my mind as the players head into the final two rounds at Medinah:

1. If Tiger keeps up his strong play, will he soon separate himself from the field as he did last month at The Open?

2. Can Davis Love and Tim Herron keep up their strong play and secure automatic spots on the Ryder Cup team?

3. Might the PGA yet again be the setting for someone to claim his first major?

4. If Geoff Ogilvy prevails, does he become the obvious selection for golfer of the year?

5. Can anyone back in the pack go really low on Saturday to jump into contention?