Raiders wide receiver Darrius Heyward-Bey left the team's 27-21 win over the Vikings on a stretcher after taking a hard hit to the head. Heyward-Bey was swarmed after catching a third-down pass over the middle early in the fourth quarter, and Vikings linebacker E.J. Henderson's knee knocked Heyward-Bey's helmet off as he approached to help with the tackle. He immediately curled up in discomfort and stayed motionless on the turf for several minutes while medical staff tended to him.