Rotator cuff disease is common among athletes and the athletic population. Rotator cuff disease is a particularly prevalent cause of shoulder pain and weakness often presented to the medical community. An understanding of the anatomy of the rotator cuff tendons and the underlying pathogenesis aids in the diagnosis. Accurate diagnosis of rotator cuff disease is offered via physical examination, x-rays, and an MRI (imaging). This article: “Rotator Cuff Disease-Basics of Diagnosis and Treatment”, offers insight into rotator cuff disease and highlights specific diagnostics and treatment patterns.