Bob Weir, Jackie Greene and former Major League Baseball player Tim Flannery will sing the National Anthem before the Giants take on the Mets at San Francisco’s AT & T Park this Wednesday, August 1. On August 1, Jerry Garcia would have celebrated his 70th birthday. Part of the park’s Jerry Garcia celebration, the game will also feature a pre-game performance by Moonalice, and fans who buy special tickets will receive a birthday-edition Jerry Garcia bobblehead. Special event ticket packages will benefit the Rex Foundation. The game is slated to start at 7:15 PM.