Much ink has been spilled highlighting the hundreds of cases filed by retired professional athletes against professional sports organizations.Certainly, these high-profile cases on behalf of the thousands of NFL and NHL retirees suffering from permanent, progressive brain disease are novel and interesting. But, what about youth sports?It is estimated that approximately 1.35 million young people suffer from sports-related injuries each year. (Safe Kids Worldwide, based on hospital ER records, 2012 Janet Loehrke, USA Today …