I doubt Robertson will be back. He probably played himself into a contract that is too rich for the Lions. There is still hope for Rakestraw, but I wouldn’t be opposed to bringing back Ya-Sin. He played will in limited duty.
Glasgow wasn't even projected to be a starter. Mahogany was replacing Glasgow and Ratledge replacing Zeitler. They don't have the cap space for expensive insurance policies. Zeitler has also declined this year.