The athroscopic procedure was performed in Vail, Colorado and cleaned out debris inside his right knee.
Oden will still be out indefinitely. This is the fourth surgery the former Ohio State product has endured since the Blazers took him with the first- overall pick in 2007.
The 24-year-old has not appeared in an NBA contest since 2009-10. He will be a restricted free agent at the end of this season.