The Dallas Mavericks on Friday signed swingman Kelenna Azubuike, who has not played in the NBA in more than a year. Azubuike played three-plus seasons with the Golden State Warriors before suffering a torn patellar tendon in November 2010. He missed the remainder of that season and that summer was shipped to the New York Knicks as part of the David Lee sign-and-trade deal. Azubuike became one of the many revolving salary cap slots held by the Knicks over the last couple