The San Diego Chargers on Friday released retired guard Kris Dielman from the team's reserve-retired list.
Dielman retired in March, 4 1/2 months after sustaining a concussion in a helmet-to-helmet collision with a New York Jets defender.
The 320-pound Dielman was staggered by the injury early in the fourth quarter of the Oct. 23 game. But he continued to play because the Chargers were out of offensive linemen due to other injuries. The team didn't diagnose his condition until after the game.
Dielman suffered a grand mal seizure on the flight home. The team plane was met by an ambulance and he was hospitalized overnight.
Ten days after Dielman was hurt, the league's injury and safety panel told game officials to watch closely for concussion symptoms in players.