More and more the perception around the NBA is that Nic Claxton is likely to re-sign with the Nets. That conceivably could happen before anybody else gets a chance to officially bid, with Brooklyn having an exclusive negotiating window with their center that starts the day after the NBA Finals ends. Other teams can’t negotiate with Claxton until 6 p.m. on June 30. It remains to be seen if the Nets will sign him before then, or at all. But there’s a perception among league executives who spoke with The Post that he’s likely to re-sign.