Many expect the Dallas Mavericks to be stuck in the middle of a very strong Western Conference, as the Mavs failed to land a superstar player this summer. And, if Dallas does in fact get mired in mediocrity, some expect owner Mark Cuban to consider trading star Dirk Nowitzki. Well, according to Cuban, there’s no chance. Via ESPN.com: “‘I’m not going to trade him,’ Cuban said Tuesday on ESPN Dallas 103.3 FM’s Ben and Skin Show.  Of course, Cuban wouldn’t want to deal Dirk. And the Mavs couldn’t pull the trigger on a trade involving Nowitzki without his permission anyway, considering that his contract includes one of the two no-trade clauses in the NBA.  But what if Nowitzki requested to be moved to a contender for the twilight of his prime? ‘Maybe I’d have the conversation,’ Cuban said. ‘But I know Dirk; he wouldn’t.’”