The overall objective of this study is to compare the clinical benefit and safety of two different surgical techniques of primary reverse total shoulder arthroplasty for the treatment of shoulder pseudoparalysis from chronic rotator cuff disease with associated teres minor dysfunction. The first surgical technique includes a concomitant latissimus and teres major transfer (transfer group) and the second technique does not include a concomitant latissimus and teres major transfer (control group).

Inclusion Criteria:

• Shoulder pseudoparalysis due to chronic rotator cuff dysfunction with or without glenohumeral arthritis.
• Chronic rotator cuff tear with severe retraction, atrophy, fatty infiltration.
• Active forward elevation of less than 90 degrees
• Teres minor dysfunction
• Positive lag and hornblower sign
• Grade 2 or greater fatty infiltration of the teres minor and infraspinatous seen on MRI
• Able to attend scheduled office visits
• Meet all criteria to have a latissimus and teres major transfer

Exclusion Criteria:

• Revision arthroplasty
• Previous shoulder infection
• Neuro-muscular disorder (ie: Parkinson's)
• Advanced dementia