Chris BroussardofESPN.com reportsthat former Portland Trail Blazers center Greg Oden underwent an Orthokine knee procedure. -------------------------------- In an effort to revive his NBA career, Greg Oden recently underwent the controversial knee procedure that superstars Kobe Bryant and New York Yankees slugger Alex Rodriguez say helped prolong their careers, according to sources. Oden, whose career with the Portland Trail Blazers was derailed by four knee surgeries, had the non-evasive procedure done in New York two weeks ago to accelerate the healing process on his left knee, which was operated on in February. "Greg had long planned to have this procedure done,'' one of the sources said. "He thought he'd wait until his knee was completely healed, but the doctor said Greg would get the greatest benefit by doing it now because it would help his recovery.'' --------------------------------Back in February, Blazers Acting GM Chad Buchanan said the procedure was something that he expected Oden to investigate.ed: text edited, bumped to front page