This issue of Clinics in Sports Medicine, guest edited by Dr. Stephen Brockmeier and Brian Werner, will discuss key topics related to Shoulder Arthritis in the Young and Active Patient. Articles include: Etiology of Shoulder Arthritis in the Young Patient, Non-Arthroplasty Options, Shoulder Hemiarthroplasty, Biologic Options for Glenohumeral Osteoarthritis, Total Shoulder Arthroplasty in the Athlete and Active Individual, Minimally Invasive and Subscapularis Sparing Techniques for Shoulder Arthroplasty, Rehab Strategies after Shoulder Arthroplasty, "Return to Play" after Shoulder Replacement Surgery, Outcomes After Shoulder Replacement Surgery in the Young Patient, and Future Frontiers in Shoulder Arthroplasty and the Management of Shoulder Osteoarthritis.