Swinney said he does not believe Williams will play again this fall.
Williams was the top-ranked Tigers' 1,000-yard receiver who was injured in the first quarter of the first game this season. Williams collided with the goalpost support and sustained a neck fracture.
Swinney said Williams will soon have a soft neck brace off and has been cleared for some running. Still, the coach would want to have overwhelming medical opinions that the junior was completely healthy before allowing him back on the field.
Williams' prognosis is for a full recovery and Swinney said he's protecting the players' potential football career.