Only 8 franchises have won the NBA Finals in the last 30 years or so. When was the last time a cinderella team won the championship? Only one NBA Finals series didn't involve the Spurs or the Lakers since the Bulls' dynasty era (2006, Heat-Mavs). To make matters worse, the NBA prolonged the first round to best-of-7, even though the Warriors overcame that challenge. But as you can see, it was a total fluke as they didn't stand a chance in the next round against the Jazz.