Roquan Smith wants the Chicago Bears to trade him after failed contract talks, but the league has warned other teams about how they go about courting the linebacker.

Smith has publicly requested a trade, but the league reminded teams Monday that any contact with Smith, or a person claiming to represent the Pro Bowler, constitutes tampering.

The warning comes a week after Roger Goodell disciplined the Miami Dolphins for prior "impermissible" communications with Tom Brady and Sean Payton, who were under contract with other teams.

It also comes days after ProFootballTalk reported that "a person purporting to represent Smith has been calling other teams in order to gauge potential trade interest."