21. 2006-07 Dallas Mavericks
The Mavericks had a cruel end to the 2005-06 year, falling short in the NBA Finals. So they hoped to improve the next year and they did, at least during the regular season. They went 67-15, claiming the top seed in the Western Conference. Things were looking good for the Mavericks.
After qualifying for the playoffs for the seventh successive season, the Mavericks were massive favorites to get past the Golden State Warriors. However, the Warriors pulled off a major upset. Some would argue that in the end, they flopped. But just going by their regular season, they’ve earned their place on this list. Today, they hope to exorcise the demons of that loss with the talents of current star Luka Donkic.