I would find it improbable the Texans would send the starting safety to NFLe. He doesn't need to play all spring after a full season coming off an ACL injury. Get him some rest, work out with the off-season conditioning coaches, attend mini-camps.
NFLe seems to be used more to send unproven players that teams don't have a lot invested in to see if someone pans out. If an unsigned guy goes over and gets hurt the Texans won't be forced to cover a huge salary which I believe still counts against their cap number.