Shooting guard Monta Ellis has decided to opt out of the final season of his contract with the Dallas Mavericks, agent Jeff Fried said. "This decision was made because it's in the best interest of Monta," Fried said. "It was more about him taking his future into his own hands." The Mavericks do not intend to attempt to re-sign Ellis despite the fact that he averaged 18.9 points last season to become the first player other than Dirk Nowitzki to lead them in scoring since 1999-2000. Fried, though, did not rule out a return to Dallas for his client.  "Monta's experience in Dallas was definitely a positive one," Fried said. "The team and the organization had success and Monta grew as a player. A door to return there will always be open." Ellis, 29, had a Wednesday deadline to determine whether he wanted to make $8.7 million in the final season of a three-year, $25 million deal or test the free-agent market. If Ellis had opted in, the Mavs would have...