Let's be real. There is no way that Houston will make a run for Derrick Johnson. Would they love to have him, absolutely!! Is it realistic, NO!! Derrick Johnson probably should be the first pick in the draft. He will be a franchise Linebacker and a future Hall of Famer, in my opinion, of course. San Fran. should use their first pick on the real thing and then take Lienart next year. But, their not going to do that. They will make Alex Smith or Aaron Rogers the first pick.
Houston is looking closely at DT's such as Shaun Cody and Marcus Spears as well as the nosetackle from USC - Patterson. They are going to address the defensive line first only because there are not any O-Lineman in this draft worthy of a high first round pick. (Not even A. Barron)
For all of us who like to waste time reviewing other people's wild guesses in the Mock Draft forums, and have fun speculating who the Texans will take with their first pick, the reality is Derrick Johnson will not be a Houston Texan....unfortunately.