Once the free agency period begins, the Boston Celtics will be competing with a number of teams flush with cap space for the privilege of signing the most coveted players on the market. One of their biggest competitors will undoubtedly be the Dallas Mavericks, who have been linked to several prominent names that the Celtics also have interest in. There's a lot like about Dallas if you are a free agent. They have a passionate owner willing to spend money, a culture of winning built around a future Hall of Fame forward and they reside in a good market. Plus, the lack of state income tax in Texas means more of the dollars that they earn on their contract remain in their pocket. This could give the Mavs a leg up in the competition for the elite free agents, but Dallas signing one of the marquee stars on the market could open up the opportunity for Boston to steal one of their players away. Monta Ellis has an $8.7 million player option for 2015-16, but could be seeking a multi-year deal coming off of a strong season. Should he decline the option to test free agency, ESPNDallas.com's Tim MacMahon speculates that the team will not offer him a new deal, stating that Ellis isn't a part of the Mavs' Plan A or 1A.