Some local (St. Pete) insight into Walker's situation. http://www.sptimes.com/2004/04/28/Bu...t_for_Ju.shtml
Sounds like there may be more than cap hit at issue.
I highly doubt the Texans do any more in free agency. They are up against the cap themselves at only $4.4 under per Clayton (and that's top 51 players - not including the ~500k for the 52nd and 53rd player. If I recall, their rookie pool is in the neighborhood of 4 million so they will be using most of their existing cap space to sign the rooks and leave a little margin for IR and practice squad players during the season.