Sydney Crosby, Merrill Hodge, Mike Matheny, Junior Seau… Do these names sound familiar? These professional athletes have all suffered from the effects of numerous concussions. Sydney Crosby (Penguins) is still trying to play NHL hockey but Hodge (Steelers/current ESPN analyst) and Matheny (SF Giants/current ST. Louis Cardinals mgr.) were medically retired from their respective sports. Junior Seau (San Diego andNew England Patriots) died in an accident that many have linked to his post-concussion issues. The media has placed much focus on concussion in recent years. Sports programs from the youth level to the pros have made it a point of emphasis. If you are an athlete or are around athletes, here are some things you need to know.