Mavericks GM Nico Harrison on Kemba Walker’s knee: ‘It’s not good.’ On Tuesday, the Dallas Mavericks, who have fallen below .500 at 10-11, officially signed point guard Kemba Walker to assist the playmaking responsibility behind Luka Doncic. Walker, who had yet to sign with a team prior to joining Dallas, is still recovering from left … Continue reading Mavericks GM Nico Harrison on Kemba Walker’s knees: ‘It’s not good.’