Tennessee would probably have trouble trading the top selection even if it wanted to. Regardless, Tunsil is an invaluable insurance policy for Marcus Mariota.
In his Monday Morning Quarterback, Peter King of Sports Illustrated posited that the Titans are "50-50" on trading away the first pick of the draft, which would probably sink Laremy Tunsil's chances of going No. 1. Whoever puts up the king's ransom to trade into that spot would almost certainly be gunning for a quarterback, and the Johnny-less Browns will surely follow suit at No. 2. Best case, that pushes Tunsil down to the Chargers at No.