Photo of the outfield seats at Safeco Field during a Seattle Mariners game.

Image Credit: David Herrera (CC BY 2.0)

The Seattle Mariners have signed a 25-year naming rights agreement with mobile telecommunications giant T-Mobile. The team’s home stadium will change its name from Safeco Field to T-Mobile Park effective January 1, 2019. According to Forbes, the new naming rights agreement will pay the Seattle Mariners $87.5M or $3.5M per season.

The stadium had been known as Safeco Field since first opening in 1999. The original naming rights agreement was for 20 years; Safeco Insurance notified the Seattle Mariners that they wouldn’t be renewing the agreement back in 2017. The Seattle Mariners will be responsible for maintenance, operations, and improvements to the ballpark; a number that has been estimated at $600M over a 20-year period. T-Mobile and the Seattle Mariners will also be able to extend the lease for multiple three-year time periods as the naming rights agreement comes close to expiration in 2043.

The Washington State Major League Baseball Stadium Public Facilities District still needs to approve of the partnership between the Seattle Mariners and T-Mobile. However, the agreement is expected to be approved unanimously. T-Mobile is headquartered in Bellevue, Washington and could potentially merge with Sprint in 2019. Much of the Safeco Field signage at the stadium has already been taken down.


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