Tom Brady has been suspended indefinitely by the New England Patriots, league sources told Fox Sports.
The league announced Thursday that Brady has violated the NFL’s substance abuse policy, which was announced last month.
“As soon as we were informed of this suspension, we immediately began an internal investigation,” the league said in a statement.
“The NFL has a zero-tolerance policy for conduct detrimental to the integrity of our game, and we have determined that Tom Brady’s conduct will not be tolerated in our league.”
A source told ESPN’s Adam Schefter that Brady had a substance abuse issue for years before the incident.
The source also told Schefter Brady has a history of substance abuse and alcohol problems.
“We have spoken to the NFL office on this matter and they are fully cooperating with our investigation,” Patriots owner Robert Kraft said in the statement.
The Patriots had a bye week before the suspension is set to take effect.
The NFL said Brady had one of the lowest passer rating marks of the season in a Week 4 loss to the Chicago Bears.
The league also said Brady has thrown a career-low 15 interceptions in 2016.