Onwenu is in his 3rd year at very low dollars. He will not be cut. Hambright might start (I doubt it), but they will not cut Onwenu even if Hambright starts as Onwenu will be a backup. There is a log jam at LB, can't imagine we keep them all, but not sure any cuts at LB would surprise. A trade at WR, as has been previously mentioned, sounds reasonable if no injuries happen. Special team guys seem reasonable if Thornton, M Jones, and others shine to clear roster spots. Zappe will make the 53 unless he is awful (does not seem to be).
My pick is Hoyer who will be added back after a few weeks in the season. Keene might go but that is not a big surprise.