9. Dallas Cowboys: Tyron Smith, OT, USC

The biggest weakness of the 2010 Dallas Cowboys was their inability to defend the pass.  The problem there was two-fold: horrible years from their pro-bowl corners, and poor play at the safety level.  There's not a whole lot the Cowboys can do to solve the safety problem and if we know anything about the way the Cowboys operate, it's that they give their proven players every chance to rebound from disaster years.
 
If Michael Jenkins and Terence Newman both have job security for this year, then the Cowboys will address their biggest offensive need: an offensive lineman.  Tyron Smith is simply the best bet in this draft for the Cowboys, or anyone looking for line help.  He's a two year starter at right tackle for the Trojans who projects on the left side as a pro prospect.  The Cowboys are an ideal situation for Smith, as the expectation won't be for him to start from day one, but he'll be the first reserve in as soon as Marc Columbo gets hurt, which would figure to happen by Week 3 of the pre-season.
 
Here's the scouting report on Smith and following is the analysis of this pick, both courtesy of Eric Galko of Optimum Scouting:

After cutting Flozell Adams last year and likely more cuts coming this off-season on the aging offensive line, the Cowboys will need to get younger and in a draft filled with first round tackles and tons of quality guards, it could be a great opportunity. Tyron Smith played right tackle over his career at USC, and while he's looked at as a top left tackle potential-based prospect, he could start at right tackle with Dallas, and then if he develops and surpasses Doug Free on the field, the two could switch down the road. That type of flexibility by tackles is rare and would do a lot for the long term development of this offense. I've heard from many in the organization that they like Prince Amukamara a lot, but Smith would not surprise me at all.