The Dallas Mavericks had an incredible run during the 2000s. Dirk Nowitzki blossomed into a legend. The cast around him changed, but the wins kept coming. From 2001 to 2011, the Mavs won 50-plus games every season. It culminated with the championship in 2011.
Mark Cuban bought the team in 2000. The Mavericks had not made the playoffs in a decade. He immediately turned things around. They made the postseason in his first full season as owner. It started a run of 12 consecutive and 15 out of 16 years in the playoffs.
Cuban attempted to change things dramatically early in his tenure as owner.