I am thinking it is very possible that the Texans trade down and then possibly take Mack.

If they don't like any of the QBs (very understandable) and they don't trust Clowney, then yes.

If Silva is projecting based on his own beliefs about team needs, OK. If he's trying to actually predict what will happen, he needs a new line of work. I can't imagine 25 picks going by without a QB being taken.

Wouldn't be a shocker. I've heard a number of analysts say Mack has more upside than Clowney.