NBA Expansion: Seattle & Las Vegas – A History of League Growth & Change

NBA Owners Pave the Way for Expansion to Seattle and Las Vegas

The NBA took a significant step toward expansion on Wednesday, March 26, 2026, as the Board of Governors formally authorized the league to explore adding franchises in Seattle and Las Vegas. The move, which could bring the total number of NBA teams to 32, signals a willingness to capitalize on the potential revenue and fan base in both markets.

For Seattle, the possibility of regaining an NBA team represents a long-awaited return after a painful departure. The SuperSonics relocated to Oklahoma City in 2008, becoming the Thunder, a move that many fans still view as a significant loss for the city. The comparison to other franchise relocations – the Dodgers’ move from Brooklyn to Los Angeles and the Browns’ shift from Baltimore – underscores the depth of feeling surrounding the SuperSonics’ absence.

Las Vegas, meanwhile, represents a new frontier for the NBA. While the city has hosted NBA events like the All-Star Game since 2007 and established the NBA Summer League, it has yet to secure a permanent franchise. Interestingly, an NBA team would be arriving in Las Vegas after the NFL, WNBA, NHL, and Major League Baseball had already established a presence there, demonstrating the city’s growing appeal as a major sports destination.

The NBA’s journey to this point has been marked by periods of instability and growth. The league’s origins, dating back to 1946, were somewhat pragmatic. Arena owners, seeking to fill their venues between hockey, college basketball, and other events, formed the Basketball Association of America (BAA). This initial league faced competition from the established National Basketball League (NBL), leading to a merger in 1949 and the creation of the NBA with 17 teams.

The early years of the NBA were characterized by frequent franchise turnover. A logistical nightmare with teams spread across vast distances, the league quickly shed teams, dwindling to just eight by the 1953-55 season. The introduction of the 24-second shot clock in 1954 proved pivotal, injecting pace and excitement into the game and stabilizing the league. This rule change, born from a desire to address stalling tactics, is often credited with saving the NBA.

Expansion continued throughout the following decades, albeit with its own challenges. Attempts to establish a foothold in Chicago were initially unsuccessful, with two separate franchises failing to gain traction. The league also experienced the complexities of the ABA-NBA merger in 1976, absorbing four ABA teams and bringing the total to 22. The arrival of superstars like Magic Johnson, Larry Bird, and Michael Jordan in the subsequent years further propelled the NBA’s popularity and financial success.

The relocation of the SuperSonics to Oklahoma City in 2008 stands as a stark reminder of the potential for disruption, even during periods of stability. The move, facilitated by the city of Seattle relinquishing its claim to the “Sonics” name and branding, highlighted the importance of arena negotiations and local support in maintaining a franchise’s viability. Oklahoma City’s enthusiastic embrace of the Thunder demonstrated the potential for a successful franchise in a new market.

While Wednesday’s vote doesn’t guarantee expansion, it marks a crucial step forward. The league’s constitution requires a supermajority – at least 23 of 30 votes – to approve such a move, and the owners’ decision to explore expansion indicates a strong appetite for growth. The potential financial windfall from adding two franchises, with valuations potentially ranging from $7 billion to $10 billion, is undoubtedly a significant factor. The next steps will involve a more detailed evaluation of both Seattle and Las Vegas as potential expansion locations, with a target date for new teams to begin play in the 2028-29 season.

The NBA’s exploration of expansion represents not just a potential increase in revenue, but also a recognition of the evolving landscape of professional sports. The success of other leagues in Las Vegas, coupled with Seattle’s passionate fan base and rich basketball history, makes both cities compelling candidates. As the league moves forward, the focus will be on ensuring that expansion enhances the competitive balance and long-term health of the NBA.