Who should start on Friday: McCown or Griffin?

Obviously this is contingent on whether Brees would play which it's looking more like he isn't. So with that being said who should get the starting nod on Friday against the Titans. I definitely think Payton only wants to keep one other QB on the active roster and Griffin may not get past waivers if he is cut. That's why I think Griffin should get the start and show his stuff against the other team number one defense. The more I see of Griffin I like and get more comfortable of the idea of him backing up Mr. Brees. What you other Who Dats think?