The governor's office isn't saying where or when Thursday the governor will have the outpatient surgery.
Doctors told Daniels that normal wear and tear might have caused the injury that was confirmed by an MRI last month, but the 61-year-old governor also hurt his shoulder during a fall in December 2009.
Orthopedic surgeon Dr. James Bico tells WTHR-TV the rotator cuff is a group of four muscles surrounding the shoulder. He says doctors usually make up to four incisions to repair a tendon.
Physical therapy afterward can last four months and Daniels likely will wear a sling for several weeks.