Coach Liam Coen originally explained Armstead's absence to "a little bit of a veteran start." Two weeks later, Armstead still hasn't taken a practice rep. Coen said this week that Armstead is out indefinitely with a back injury, which Coen admits makes Armstead's availability for Week 1 uncertain.

Arik Armstead has yet to play a down during Jacksonville’s training camp. His lingering absence has the Jaguars concerned about his availability for the season opener.

Jaguars defensive lineman Arik Armstead is dealing with a back injury. What does the team know now about his potential Week 1 availability?