Throughout franchise history, the Dallas Mavericks have had moments that set the franchise back. From having the 1990s become the lost decade, from passing on Charles Barkley in the draft, to potentially the Luka Doncic trade in 2025 that sent him to the Los Angeles Lakers for Anthony Davis.
Along with the aforementioned fumbles by Dallas, one decision was made in 2004 that turned out to be a rough one that Mavs fans may never get over. That was letting Hall of Fame point guard Steve Nash walk in free agency. After leaving Dallas for the Phoenix Suns, Nash had his game elevated more by winning two consecutive MVP awards in his first two years with the Suns, which was a major slap in the face to Dallas.