Even if they take an OT at 18 (Mims, Latham etc) they aren't beating out Tent Brown in training camp, or the regular season likely.
The only way they still see the field is if there's an injury. So it would most likely be a redshirt year for them. Which is ideally what you want on good teams.
This likely plays into the idea of taking a Murphy, DeJean, or Bowers instead, who could see snaps week 1.