We present 3 cases reporting the normal appearance of the post COVID-19 vaccination on shoulder MRI exams. All three patients were imaged 1-5 days post-vaccination for unrelated MSK shoulder symptoms, and none reported any symptoms besides mild shoulder discomfort for a day or two following vaccine administration. All three patients demonstrated characteristic deltoid edema, quadrilateral space region edema and axillary nodal prominence. Vessel prominence with T2 and T1 increased signal draining to the approximate location of the quadrilateral space and axilla was an associated feature. The normal appearance of the COVID-19 vaccine on shoulder MRI has not been previously described, and recognition by the radiologist will prevent erroneous differential diagnosis, unnecessary medical workups, and detract from the clinically relevant pathological imaging findings in patients with shoulder pain.