NHL Players Union Files Grievance Over Concussion Protocol Changes 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 sources, the NHLPA has filed a grievance with the league over recent changes to concussion protocol, which the union believes puts players at greater risk of injury. The dispute centers around the NHL's decision to increase the number of hits a player can take before being removed from the game, sparking concerns about the long-term effects of repeated blows to the head. As the NHL continues to grapple with the issue of player safety, this development is likely to have significant implications for the league's policies and procedures.