The U.S. Open cannot be won on Thursday. That doesn't mean that it can't be lost.
So after Day One, we have seen a number of guys make a move.
None more so than Rory McIlroy.
After three great days of play at the Masters, McIlroy struggled during the final round and failed to hold on for the victory.
Here at Congressional, McIlroy has matured. He now knows what it will take to win a major.
So after Day One, lets take a look at the top 10 candidates to win it all.