TheĀ Seattle MarinersĀ sign a new 25-year lease to continue playing atĀ Safeco Field. The lease will take effect at the expiration of the current 20-year lease at the end of the season, a lease which was signed when the ballpark opened inĀ 1999.

On May 23, 2018 — TheĀ Seattle MarinersĀ sign a new 25-year lease to continue playing atĀ Safeco Field. The lease will take effect at the expiration of the current 20-year lease at the end of the season, a lease which was signed when the ballpark opened inĀ 1999.

Source:
Baseball Reference May 23