The concussion reportedly caused him dizziness and headaches for multiple days .
The hit by Gibson made direct impact with Shields ' helmet and caused a concussion that sidelined him for the Packers ' Week 7 victory at the Minnesota Vikings .
The concussion reportedly caused Shields dizziness and headaches for multiple days .
The hit by Gibson made direct impact with Shields ' helmet and caused a concussion that sidelined him for the Packers ' Week 7 victory at the Minnesota Vikings .