<P> The Seattle Mariners farm system consists of seven Minor League Baseball affiliates across the United States and in the Dominican Republic . Four teams are independently owned, while three--the Modesto Nuts, Arizona League Mariners, and Dominican Summer League Mariners--are owned by the major league club . </P> <P> The Mariners have been affiliated with the Triple - A Tacoma Rainiers of the Pacific Coast League and Class A Short Season Everett AquaSox of the Northwest League since 1995, making them the longest - running active affiliations in the organization among teams not owned by the Mariners . These are also the longest affiliations in the team's history . Their newest affiliates are the Arkansas Travelers of the Texas League which became the Mariners' Double - A club in 2017 along with the Modesto Nuts of the California League who joined as the organization's Class A-Advanced club also in 2017 . </P>

Where are the seattle mariners minor league teams located