Robinson was directed to the sidelines after taking a hit to the upper body in Chicago's 24-10 loss to the Rams on Monday.
With a few minutes left in the game, the referees instructed Robinson to leave the field, and while he walked off under his own power he didn't return for the last drive of the game. Before leaving the game, he'd caught four passes for 70 yards, including a 42-yard bomb down the middle of the field.