• At Boston University researchers tested deceased NHL brawlers named Bob Probert and Derek Boogaard and found chronic traumatic encephalopathy which is a continuous decay of brain tissues, which was caused by concussions (Gasper, 2013).
• Derek Boogaard was a former NHL enforcer whose brain showed signs of neurodegenerative disease which can be linked to repeated head trauma (Press, 2011).
• NHL players that take several blows to the head may lead to concussions (Staff, 2013).
• Concussions are a type of traumatic injury which is caused by a hit, or mainly any type of injury that causes the brain to be shaken inside the skull (HealthWise, 2014).
• Athletes may have to deal with chronic headaches, dizziness, nausea,