SEATTLE -- Crews have been working all week at Safeco Field in Seattle to prepare it for Friday night's Paul McCartney concert.
It will be the first public concert in the baseball stadium since it opened in 1999. A crowd of about 45,000 is expected.
Most of the work has gone into laying down a protective surface to protect the field from forklifts and other machinery setting up the stage in center field.
After the concert, crews will work through the weekend, removing everything and preparing for the Monday night Mariner's game.
The Beach Boys held a private concert at Safeco Field in 2008. WWE held WrestleMania 19 there in 2003, setting a stadium attendance record of 54,097.