Portland Trail Blazers Acting GM Chad Buchanan said that Blazers center Greg Oden would undergo an arthroscopic procedure on his left knee as soon as doctors could treat minor blood clots in his left ankle that were discovered before he underwent an arthroscopic procedure on his right knee last Friday. Jason Quick of The Oregonian reports that the procedure has been tentatively scheduled for Feb. 13. That would be the tenth day after his right knee procedure. Buchanan said doctors had hoped that Oden would be able to undergo the second procedure in a 7-10 day window after the first one, if the ankle allowed. The procedure on Oden's right knee was successful in removing loose articular cartilage. Buchanan said that Oden remains "out indefinitely" and admitted only that undergoing the procedures "doesn't increase the likelihood of him playing soon." -- Ben Golliver | benjamin.golliver@gmail.com | Twitter