 In Week 5, Grimes recorded a season-high seven combined tackles and deflected two passes during a 25–14 loss to the Green Bay Packers.In Week 12, he sustained a knee injury and underwent minor knee surgery that sidelined him for the next three games (Weeks 13–15).Grimes re-injured his knee and was inactive for the Falcons' Week 17 victory against the Tampa Bay Buccaneers and during their NFC Wildcard Game at the New York Giants.