UPDATE:
It was confirmed that Robinson suffered a concussion. He will enter the league mandated concussion protocol this week.
Robinson was replaced by Keith Reaser. The team is already without Jimmie Ward, who opened the season as a starter. In Ward's place, Robinson had been playing at a high level leading up to the game against the Bills. Other than NaVorro Bowman, who is out for the season, Robinson was the 49ers' highest-graded player this season per advanced statistics site Pro Football Focus.
Rashard Robinson being evaluated for a head injury #49ers #49wz
— Al Sacco (@AlSacco49) October 16, 2016