I have this exact same dilemma. I am leaning Mariota bc (1) Titans are playing to win the division, (2) I feel like Seattle v. AZ games always end up odd, bc of some kind of division rivalry or something. Game 1 was the field goal marathon that ended in a tie I think.
I think Mariota bounces back, but I also went with Trevor Siemian over Wilson last week......so...