Miami Dolphins left tackle Terron Armstead has been ruled out of the team's game Sunday against the Buffalo Bills with a knee injury. Armstead was rolled up on late in the second quarter and walked to the locker room with the team's medical trainers. Kendall Lamm took Armstead's place at left tackle. Armstead had knee surgery in the offseason and missed the team's OTA and minicamp practices. He also injured his left leg in training camp and missed the first two games of the season. Armstead was listed as questionable to play Sunday with knee, back, and ankle injuries.