This current special issue of the Journal of Clinical Sport Psychology was conceived and developed to provide a resource for clinicians who have contact with athletes who are at risk for or have sustained a concussion during sport participation. The special issue is part of an exciting two-issue series. This first installment contains papers from leaders in the field of sport concussion who review the frequency and mechanisms of concussion, models for managing concussion, the emotional aspects of concussion in sport, practical examples from a model sport concussion clinic, and the importance of sport concussion education and prevention. As Guest Editors, we hope that this timely and unique special series will be used by clinicians who help care for athletes and their families who have experienced concussion in their sport life.