Why Blair is still a Spur

The San Antonio Spurs were willing to deal forward DeJuan Blair last month at the Feb. 21 trade deadline, however no team was willing to give up a first round pick for him. Blair doesn't have a future with the Spurs and Friday was the last day a player could be waived and still remain eligible for the post-season with another team. So, why did he not receive a buyout from the Spurs?