Unilateral adrenal hemorrhages are a rare finding and when discovered they are usually due to a blunt trauma or secondary to anticoagulation therapy. We report a case of a 72-year-old Filipino male presenting with an unsuspected large adrenal mass discovered on abdominal computed tomography that was requested to evaluate a palpable soft, non-tender right lumbar mass. Characteristics of the mass on CT scan pointed to a possible adrenal neoplasm. Endocrine work up revealed a non-functioning adrenal mass. Exploratory laparotomy and resection of the retroperitoneal mass was done with a histopathologic finding of a diffuse adrenal hemorrhage.