In December, Cuban sold his majority stake in the Mavericks — he still owns 27 percent of the team and oversees basketball operations — and is also vacating his “Shark Tank” chair at the end of the current season to spend more time with his three children.

Mavs ManiAACs - The Official Home of the Dallas Mavericks.

"Maverick" doesn't explicitly refer to a cowboy, but a cowboy could absolutely be described as a maverick. The Mavericks associate themselves with typical Texas themes — cowboys and horses — through their logos, even if their name doesn't directly refer to either.