Signs that the Browns might not be as confident in Baker Mayfield as we once thought

Teams sign backup QB's all the time - But it's rare to see a team sign a quarterback to a 3 year backup deal. It's rare to see it because QB's are always fighting to be the starter. So why would Keenum marry the Browns for three seasons to be the backup. Maybe he has been told something differently behind the scenes? Why else would Keenum, a guy who has had success as a starter through out his career, accept a backup role for three seasons? It's probably because he feels that a chance to be the starter is closer than many think.