The NHL Concussion Evaluation and Management Protocol is issued by the Concussion Subcommittee of medical, legal and hockey experts from the NHL, the NHL Players' Association, and individual teams. It sets forth the procedures teams shall follow regarding concussion education, testing, identification, evaluation and management.
Put simply, it is the rulebook for concussions. The Penguins followed the rules when Crosby sustained a concussion in Game 3 on May 1 and returned in Game 5 five days later, and again when Crosby fell into the end boards in Game 6.
In the first period of Game 3, Crosby went to the net on a 2-on-1, got knocked off balance by Capitals captain Alex Ovechkin and took a cross-check to the head from Capitals defenseman Matt Niskanen. Crosby missed the rest of the game, and Penguins coach Mike Sullivan announced the next day Crosby had a concussion. Crosby skated for three days, including a full-contact practice, and passed a baseline test before returning for Game 5.
The protocol states there is no mandatory amount of time a player must be withheld from play following a concussion, because the decision is based on individual circumstances. The player must satisfy three criteria to return to play: complete recovery from concussion-related symptoms at rest, no emergence of concussion-related symptoms at exertion levels required for play, and a return to neurocognitive baseline. The team doctor is solely responsible for the return-to-play decision.
In Game 6, Crosby took a stick to the face, bumped heads with teammate Patric Hornqvist and went off slowly early in the first period. Crosby went to the net ahead of Capitals defenseman John Carlson and Hornqvist, clipped goaltender Braden Holtby, fell headfirst into the end boards, and got up slowly late in the first.
"I was just going hard to the net," Crosby said. "I don't know if I tripped on a stick or someone else. I mean, I just got tripped up there going pretty fast and went into the boards pretty awkwardly. Felt fine. Just kind of knocked the wind out of me, but felt fine. If you're looking for a test when you're coming back, that's a good one."
The NHL added concussion spotters as an extra layer in the process this season. They noted the play and spoke to the Penguins.
It did not meet the criteria for mandatory removal from play for acute evaluation.