The Blazers still aren't sure how or when Greg Oden injured his right knee. On his blog, Oden mentioned that he first felt pain getting off his couch two weeks ago. Pritchard said Oden played pickup basketball with teammates Sept. 5, then did a full running workout on a track the next day. That's when the team noticed swelling.

"The honest truth is that we don't know," Pritchard said. "It could have happened when he was playing basketball, it could have happened when he was running the track . . . we just don't know."