SANTA CLARA – Defensive lineman Arik Armstead exited the 49ers’ game Sunday after just five plays when he aggravated a left shoulder condition that has plagued him since training camp.
Armstead was re-injured on a play in which New Orleans Saints running back Tim Hightower gained 3 yards. Armstead also left the 49ers’ Oct. 23 game against the Tampa Bay Buccaneers with the shoulder condition.
Armstead did not participate in the exhibition season after sustaining the injury in training camp. At one point, Armstead said his shoulder might require surgery after the season.
The 49ers selected Armstead in the first round of the 2015 draft with the 17th overall pick. He did not start the first four games of the season, but Sunday was the fourth game in row in which he started at left defensive tackle.
Armstead entered the game tied for the team-lead with 2.5 sacks.