The PFD's mission is to maintain and enhance T-Mobile Park in order to promote the success of Major League Baseball in the State of Washington, enhance fan enjoyment and contribute to an economically successful, safe, desirable, innovative and walkable stadium neighborhood. In addition to what happens inside the ballpark, the PFD works both to protect and to leverage the value of this publicly-owned asset on transportation, zoning and development issues in neighborhoods adjacent to the ballpark. The role of the PFD is to ensure compliance with the terms of the new lease by reviewing the annual Ballpark Management Plan. This includes overseeing investments in T-Mobile Park, ensuring it is maintained as a "first class" facility by the Mariners as required in the lease. The PFD also works with the Seattle Mariners to provide public benefits that enhance the fan experience and improve the neighborhood surrounding the ballpark.