Montreal Canadiens Max Pacioretty lies on the ice after being hit into a glass stanchion by Boston Bruins defenceman Zdeno Chara during the second period of NHL hockey play in Montreal, March 8, 2011. (SHAUN BEST/Shaun Best/Reuters)
Sidney Crosby of the Pittsburgh Penguins falls to the ice during the 2011 NHL Bridgestone Winter Classic at Heinz Field on January 1, 2011 in Pittsburgh, Pennsylvania. Crosby suffered hits to the head during this game and a game four days later, during which he began exhibiting symptoms of a concussion.
Crosby has not returned to the ice since then. (Brian Babineau/Brian Babineau/NHLI via Getty Images)
Boston Bruins centre Patrice Bergeron wears a neck brace as he faces reporters during a news conference in Boston on Nov. 8, 2007. Bergeron said the NHL must crack down on hits from behind, like the one he sustained during an Oct. 27 game against Philadelphia. It left him with a severe concussion and a broken nose (Steven Senne/Steven Senne/AP)
New Jersey Devils Scott Niedermayer lies on the ice after he was injured in the closing seconds of their game with the Toronto Maple Leafs, May 3, 2001. Niedermayer was knocked down by Toronto Maple Leafs Tie Domi who was given a five minute penalty with the intent to injure. (ANDY CLARK/Andy Clark/REUTERS)
n this image from television, Marty McSorley of the Boston Bruins hits Vancouver Canuck Donald Brashear with a swinging slash to the right temple on Feb. 21, 2000 in Vancouver. Brashear was twitching on the ice as trainers rushed to his side. He was later diagnosed with a concussion. McSorley later admitted, "I got no excuse. I got carried away. It was a real dumb play." McSorley was convicted of assault with a weapon and sentenced to 18 months of probation. He would never play in another NHL game. (TEL/AP/ESPN)
During the final game of the between Canada and the Soviet Union in the 1987 World Juniors, Pavel Kostichkin took a slash at Theoren Fleury, sparking what became one of the most infamous bench-clearing brawls in hockey history. The officials, unable to break up the fight, walked off the ice and tried shutting off the arena lights, but the melee lasted for 20 minutes. (AP)
This YouTube image shows Bobby Clarke breaking Valery Kharlamov's ankle during the 1972 Team Canada vs. USSR Summit Series game. (YouTube)
In a preseason game on Sept. 21, 1969, Wayne Maki (left) of the St. Louis Blues and Boston Bruins defenceman "Terrible" Ted Green (right) engaged in a bloody, violent stick-swinging fight. Moments after this photo was taken, Green was hit in the head and suffered a fractured skull and a brain injury.
Eddie Shore, Boston Bruins defense star, is shown being carried from the ice at the Boston Garden, Dec. 12, 1933, after he had been knocked down by Red Horner of Toronto. Horner struck Shore after the latter had "checked" ce Bailey, Toronto winger and sent him to the ice badly hurt. Bailey suffered a fractured skull. (Globe and Mail archives)
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