Introduction You can never have too much information when it comes to your brain. Play it Cool™ is designed to make sure; you as an OFFICIAL, have the information needed to understand concussions. Here is some very basic information about concussions to help you as a referee understand fully the impact of the fastest growing injury in sport. It is one thing to break a bone, or tear a ligament; it is another to break your brain, the mind is the most precious gift! In North America, over 350,000 sports-related concussions occur annually. Estimates of the likelihood of an athlete suffering a concussion while playing a contact/collision sport are as high as 19% per year. More than 62,000 concussions occur each year in high-school contact sports, and among college football players, 34% have had one concussion and 20%, multiple concussions. The numbers are very similar for hockey players. Sports-related concussion estimates vary across studies. Earlier research estimated that about 6% of athletes incurred a concussion each season. However, as results from more studies on concussion began to appear in the popular media, there was also an increase in the reporting of concussions and concussion-like conditions. Recent studies of high school sports involving contact or collision estimate 15% to 20% of participating athletes will suffer a concussion. That is a rate of about 1 in every 5 athletes. One major issue all sport has collecting data is the stigma placed in reporting a concussion. Most parents and players are scared to have a label attached because of scouting reports. If a player has a history of concussions at a young age, it can be harmful for moving up in their sport. What is important to understand is hockey is only a game concussions can be a lifetime. Concussions often cause significant and sustained neuropsychological impairments for information-processing, problem solving, planning, and memory, and these impairments worsen with multiple concussions.