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Repairing massive rotator cuff tears (MRCTs) can often be technically challenging due to tendon retraction, bursal fibrosis, and muscular fatty infiltration that usually occurs, often resulting in poor outcomes and an unpredictable prognosis. Although some other surgical management options have been reported, there is a lack of literature supporting tendon transfers in the presence of combined anterior and posterior-superior irreparable rotator cuff tears. We describe a case where a combined transfer of the latissimus dorsi and lower trapezius tendons was employed to treat an MRCT affecting the anterior and posterior superior portions of the rotator cuff. A 64-year-old male presented significant pain and limited range of motion in the right shoulder following a traumatic anterior shoulder dislocation seven months prior. MRI showed retracted tears (> 5 cm) of the supraspinatus, infraspinatus, and subscapularis tendons with significant fatty infiltration (Goutallier IV). The patient underwent an open transfer of the lower trapezius tendon to the greater tuberosity and the latissimus dorsi to the lesser tuberosity. At the final follow-up, 2.5 years postoperatively, the patient exhibited a painless functional range of motion and could resume daily activities. Although there are alternative surgical options available, the positive outcomes observed in the presented case may be attributed to the restoration of rotational strength and the re-establishment of force coupling across the shoulder. This report describes the successful implementation of a surgical treatment option for managing MRCT affecting the anterior and posterior superior portions of the rotator cuff. • Combined transfer of latissimus dorsi and lower trapezius tendons for massive rotator cuff tears • Non-arthroplasty surgical option for tears involving anterior and posterior-superior regions • At 2.5 years post-op, patient achieved painless functional range of motion • Addresses literature gap on tendon transfers for combined irreparable rotator cuff tears [ABSTRACT FROM AUTHOR]