NFL

The NFL has warned players to cut out the trash talk, specifically when it threatens other players.
NFL warns teams about trash talk

Threats that are physical in nature will be taken into account when evaluating discipline for illegal physical contact during game. Threats that are physical in nature will be taken into account when evaluating discipline for illegal physical contact during game.
NFL warns players to curb trash talk

The NFL has told multiple teams the trash talk and bravado that surfaced this week was expected to stay off the field.
NFL playoffs: Executive VP Ray Anderson warns teams about trash talk