When NBA free agency begins at midnight July 1, Brooklyn Nets star guard Deron Williams will be choosing from a two-team list that only features the Nets and the Dallas Mavericks, according to sources close to the situation. Other teams, including the Phoenix Suns and Houston Rockets, had been hoping to lodge their own bids for Williams once free agency begins, sources said. The Los Angeles Lakers, likewise have continued to express interest in a sign-and-trade package built around Pau Gasol for Williams, sources say, despite the Nets' longstanding insistence that they have no interest in Gasol and would only consider such a move if they were getting back All-Star center Andrew Bynum, whom the Lakers have not made available.