Teams can talk to players and even reach an agreement in principle, but deals can't be signed until July 11th. That's when the July moratorium - the time period that the league figures out how much Basketball Related income they made last year and computes the new salary cap - is lifted. At that point, the Blazers can submit a formal offer for Hibbert and other teams can submit a formal offer for Batum. Once a restricted free agent signs an offer sheet, his previous team has 3 days to decide to match the contract or let the player walk.