DALLAS (AP) — The Mavericks and New York Knicks agreed Wednesday to a six-player trade that returns center Tyson Chandler to Dallas three years after he helped win a championship only to leave right away in free agency.The Mavericks sent guards Jose Calderon, Shane Larkin and Wayne Ellington and center Samuel Dalembert to the Knicks for Chandler and point guard Raymond Felton.The Knicks also get both of Dallas’ draft picks Thursday night, a pair of second-round selections at Nos. 34 and 51. New York didn’t have a draft pick before the first major personnel move since Phil Jackson took over as team president.“The journey to build this team for the upcoming season and beyond continues,” Jackson said.