The Mavericks signed free agent forward Harrison Barnes to a four-year, $94 million maximum contract as soon as the rules allowed, with a lighthearted poke at the drama that cost them DeAndre Jordan last year. Dallas owner Mark Cuban tweeted a picture shortly after the NBA's moratorium ended at 12:01 a.m. Eastern time Thursday showing the former Golden State player playfully handcuffed to president of basketball operations Donnie Nelson, with both smiling. It was actually still late Wednesday night in Barnes' hometown of Ames, Iowa, where the signing took place.