Dallas Mavericks owner Mark Cuban ushered in a new era for the team. When he purchased the Mavs in 2000, the organization had not made the playoffs since 1990. It was an almost immediate turnaround under Cuban. The Mavericks had Dirk Nowitzki, Steve Nash, and Michael Finley on the roster, but they did not win before the ownership change.
They made the playoffs 15 times in the next 16 seasons starting in 2001. It was a fantastic run led by Dirk that saw the Mavs in two NBA Finals and winning the championship in 2011.