sit the highest paid QB backup in the league in favor of the 3rd stringer. Never gonna happen - they'll always go first with TB, and just allow him to either succeed or fail on the field. Even if down deep the coaches like TH better as a long term heir to DB (which may or may not be the case that they think that), they'd never show that hand just yet, until TB either stinks it out in games, gets injured, or moves on with free agency.