Not a chance. BB has immense amount of pride. No way he tries to go 2 and 14 next season. TB leaves and now he is a bad coach. Kills his legacy.
Plus, he does not have time to waste 3 to 4 years of developing a young QB. IIRC he is the oldest coach in the league.
Plus, it is such a gamble. Like Tua, what if Trevor gets hurt. Would have been for nothing.