The November 28 game between the Sacramento Kings and Golden State Warriors averaged 2 million viewers on TNT, making it the most-watched In-Season Tournament game of the year.
The game also represented a 93% increase in viewership from last year's comparable window.
Group Play games across ESPN and TNT averaged 1.5 million viewers, up 26% from last year.
The In-Season Tournament also helped the NBA App and league's social media accounts to its best November ever with 3.9 billion views.