No, he has no reason for being on the final roster. Might be nice to have on the practice squad and see what happens over the next 12 months but he has done nothing that anyone should be worried about losing. If he was 21-22 years old, then maybe but if some other team wants to put an inexperienced 26 year old QB from DIII on their 53 man roster, then they can have him. A dozen guys just like him or better are available every year on the last day of the draft or in free agency.
So, is this game for the Governor's cup? The Texans are very aggressive and fired up, obviously. Cowboys, not so much, sadly. The regular season cannot get here fast enough.