There are plenty of unanswered questions heading into the 2008 U.S. Open Championship. How will the defending champion, Angel Cabrera, fare this time around? Will Sergio Garcia use his recent win at the Players Championship to catapult him to his first major title? And of course, how will Tiger Woods' left knee hold up after undergoing surgery?

It seems the only sure bet heading into the 108th U.S. Open is Kenny Perry will not be there. So, as the world's best gather at Torrey Pines, it's time for SportsNation to size up the field. Below you'll find 25 of this year's top contenders, but who are the best bets to win it all?

You must rank at least five golfers to cast your ballot.