I don't know....according to KFFL:
Texans | More On Colvin Visit - posted at KFFL (http://nfl.kffl.com
9:15 PT: The Houston Chronicle reports free agent LB Rosevelt Colvin's (Bears) visit to the Houston Texans went well. He was persuaded to visit Reliant Park after a call from coach Dom Capers. "It's definitely appreciated," Colvin said of Capers' personal involvement. "The way they expressed their interest really got my attention and made me think that maybe they really have something to offer me." Although Colvin has played only in 4-3 defenses, he believes his abilities match up well with the Texans 3-4 defensive scheme. Colvin could command an annual average salary of $4 million. Interestingly, Colvin said he and his agent, Kennard McGuire, have not begun considering salary offers.
That really sucks....if I were Colvin, I would be very intrigued by the prospect of playing in a Dom Capers run 3-4. Colvin is a perfect fit in that defense, and would put up huge numbers.