He was helped from the field by trainers after sustaining the injury.
Knights announced in August that this season would be his last, after a career ravaged by injury.
The 28-year-old played 102 games with Adelaide before moving to Richmond where he only managed six games in three years.
He had been hopeful of a return to the senior side after some promising performances at VFL level in recent weeks.
Richmond will reveal the extend of the injury later today.