The NFL has filed a grievance against the NFL Players Association, alleging that union leaders, including president JC Tretter, have advised running backs to “consider feigning or exaggerating injuries” to help increase their leverage in contract talks.The NFL has filed a grievance against the NFL Players Association, alleging that union leaders, including president JC Tretter, have advised running backs to “consider feigning or exaggerating injuries” to help increase their leverage in contract talks.Read More