The NFL has filed a grievance against the NFL Players Association, alleging that union leaders have advised running backs to "consider feigning or exaggerating injuries" to help increase their leverage in contract negotiations.

The grievance was filed Sept. 11 and will be reviewed by an arbitrator.

The NFL said the union made the suggestion to running backs during a Zoom meeting before the season.

Any player who took the union's advice and faked an injury would be violating the collective bargaining agreement, the league argued.