The procedure to repair his right pectoralis major was performed Wednesday by Dr. Neal ElAttrache at the Kerlan-Jobe Orthpaedic Clinic in Los Angeles. The large chest muscle attaches to the right shoulder.
Brown will remain in Southern California doing rehab before returning to the Bay Area next week. The Warriors say the injury will sideline Brown at least three months.
He was injured in a victory over the Miami Heat on Jan. 10. In nine games this season, Brown averaged 6.3 points and 6.3 rebounds in 20.8 minutes.
The Washington Wizards selected Brown with the top pick in 2001.