NHL Players Union Files Grievance Over Concussion Protocol The National Hockey League Players' Association (NHLPA) has taken a significant step in its ongoing efforts to protect the health and well-being of its players. According to reports, the NHLPA has filed a grievance against the league, citing concerns over the concussion protocol implemented in response to growing concerns about head injuries in the sport. The grievance is believed to be related to the league's handling of concussions during the 2016-2017 season, with some players and their representatives expressing frustration over the perceived lack of consistency and transparency in the protocol. As the debate over player safety continues to heat up, this move by the NHLPA could have significant implications for the future of the game.