Multiple sources say the Knicks – who are owned by Cablevision, which also owns Newsday – have tried since the summer to engage the Rockets in trade talks for McGrady but have been unsuccessful. However, an opportunity could present itself after the latest episode – a reported spat with Adelman about McGrady’s return schedule – that reportedly even has infuriated Rockets owner Leslie Alexander, who used to be one of McGrady’s staunchest supporters.