The NBA was close to returning to Seattle in 2013, but the Sacramento Kings ultimately did not relocate.

With franchise valuations at an all-time, expansion would give other NBA owners an instant influx of cash.

"I think it is possible some teams can be in different markets, but expansion is not on our agenda right now," said Silver when asked if there will be more than 30 NBA teams in United States by 2024. 

"Thirty teams feels right, part of it is not just a financial issue, but a competitive issue."