Aldon Smith‘s hopes of continuing his NFL comeback with the Seattle Seahawks are over.

The team waived the veteran defensive end, it announced, with sources telling ESPN the move was because of an off-the-field matter. The decision is not football-related but rather the result of Smith violating the team’s trust, according to a source.

The 31-year-old Smith has faced alcohol and legal issues for much of his NFL career, including an arrest in April on a second-degree battery charge in Louisiana. That incident occurred shortly after the Seahawks signed him to a minimum-salary deal hoping that he could keep his personal life in order and continue his career revival, which began last season with the Dallas Cowboys after he missed the previous four seasons because of NFL suspensions.

Smith has been staying in a sober living home in Seattle, as he did last season in Dallas. While speaking with reporters on July 31 for the first time since signing with the Seahawks, Smith said his “tremendous support staff” helps him with his ongoing attempt to remain sober.