Second-year Vikings defensive lineman B.J. Dubose tore his anterior cruciate ligament during today’s organized team activity at Winter Park, according to a league source, and is expected to miss the entire 2016 season.

Dubose suffered the knee injury this morning during an 11-on-11 drill, crumpling to the turf inside the team’s indoor practice facility. Moments later he was helped up and he limped away to the athletic trainer’s room.

Dubose was a sixth-round pick last spring. He spent most of the 2015 season on the practice squad before being promoted to the 53-man roster for the playoff loss to the Seahawks. He did not play in that game.

This spring, Dubose was competing for a roster spot and playing time behind starting defensive tackle Sharrif Floyd. Prior to his injury today, Dubose lined up with the second-team defense. Veteran Tom Johnson was with the first-stringers as Floyd sat out the practice with an injury.

Now Dubose figures to spend the 2016 season on injured reserve as ACL injuries typically require at least six months of recovery time.