San Francisco 49ers defensive linemen Glenn Dorsey, left, and Arik Armstead stretch during the team’s NFL football training camp in Santa Clara, Calif., Sunday, Aug. 2, 2015.
San Francisco 49ers defensive linemen Glenn Dorsey, left, and Arik Armstead stretch during the team’s NFL football training camp in Santa Clara, Calif., Sunday, Aug. 2, 2015. Jeff Chiu AP
San Francisco 49ers defensive linemen Glenn Dorsey, left, and Arik Armstead stretch during the team’s NFL football training camp in Santa Clara, Calif., Sunday, Aug. 2, 2015. Jeff Chiu AP