A lot of the field has already teed off in the first round of the 2011 U.S. Open, and like always, it is proving to be a pretty difficult test. As I type, there are only nine players under par, and no one is more than one stroke below. Of the nine players under par, Luke Donald, the current No. 1 player in the world, is probably the biggest name.

Donald was 2-under par through three holes, but a bogey on the fourth hole dropped him back to just 1-under. Some of the other big names under par are Stewart Cink, Nick O'Hern and the Big Easy, Ernie Els.

On the flip side, just about half of the field that has teed off is over par. Just goes to show you how difficult the U.S. Open is. Unlike some of the other majors, the winner of this tournament is never too far away from par (Tiger Woods in 2000 notwithstanding). So if you like low scoring golf, this might not be for you, but it should continue to be a great test of the golfers' ability.