If he has a late preference he will wait until part two. I think you can offer (I think), but he will never sign with you. I am pretty sure during beta you could extend the offer, and some players would drop their considering level if you offered and did not have an opening.
Can one of the beta testers who tried this confirm this fact? I have recently answered a site mail with the advice of not extending an offer you do not have, based on what could be a faulty memory from last years beta test.