Three sources have told The Big Lead that high-level people in the NBA league office are not happy with Turner’s performance in the NBA TV joint venture; one source said the NBA is considering clawing back Turner’s portion of the network control in the next rights agreement. The NBA disputes accounts of any unhappiness with the partnership. “We have a terrific long-standing partnership with Turner Sports and WarnerMedia,” NBA spokesman Mike Bass tells The Big Lead. “They provide outstanding NBA coverage across multiple platforms and are constantly evolving and innovating. Anyone who tells you we feel otherwise is wrong.”