T-Mobile Park in Seattle is a retractable roof baseball park formerly sponsored by Safeco Insurance Company. At that time, the park was named Safeco Field. It is the home stadium of the Seattle Mariners baseball team and has a seating capacity of 47,929. The first game played in this park was on July 15, 1999. The naming rights for the park changed to T-Mobile in 2019 and the Seattle Mariners organization donated several of the Safeco signs to the MOHAI collection. This sign lists items prohibited in the park including drinks purchased outside the stadium, cooler bags, air inflatables, laser pointers, noise makers, weapons, and other things.