Subsequently, in 2004, the channel shortened its name to FSN Northwest, through the networks' de-emphasis of the "Fox Sports Net" brand.

In April 2013, the Seattle Mariners announced that they would acquire controlling interest (a 71% stake) in Root Sports Northwest, as part of a long-term extension of its contract with the team through the 2030 season.

DirecTV remained a minority stakeholder (29% stake) and controlling partner, and the network continued to operate under the Root Sports brand.

On April 25, 2024, The Kraken announced that they would be leaving Root Sports in favor of broadcasting over-the-air through a deal with Tegna and its Seattle stations KING-TV and KONG-TV, along with streaming through Amazon Prime Video.

[15][16] In June 2021, it was announced that Root Sports had acquired the regional television rights to the Trail Blazers beginning in the 2021–22 season; the network's wider carriage, especially on streaming services and satellite, in comparison to NBCSNW was a factor in the acquisition.

[15][26] Additional team content aired on the network includes pre- and post-game shows, game replays, and the weekly magazine program The Trail.

[27] The Trail Blazers would later create their own thing in collaboration with the Sinclair Broadcast Group to air games throughout the Oregon and Washington areas called the Rip City Television Network.

Until 2023, Root Sports carried Vegas Golden Knights games and related programming produced by then-sister network AT&T SportsNet Rocky Mountain on cable providers in Idaho and Montana.

Due to territory rights, neither Portland Trail Blazers nor Seattle Kraken games will air in these areas of Idaho and Montana.

[33] However, the Jazz continue to air games on Root Sports Northwest, simulcasting broadcasts produced by the team for KJZZ-TV and the Jazz+ streaming service.

[36] On September 30, 2021, Dish Network's carriage agreements for Root Sports Northwest, and AT&T SportsNet Pittsburgh and Rocky Mountain expired.

[43] When the Mariners' First Avenue Entertainment acquired majority control of Root Sports in 2013, Comcast had 3.4 million subscribers in the team's home market.