Jeff Austin will join a growing list of site regulars who have taken a stab at the National Anthem this summer when he sings the ‘Star-Spangled Banner’ at Wrigley Field on July 30. The Yonder Mountain String Band mandolinist will step to the plate at 7 PM before the Cubs take on the Phillies. Meanwhile, the Yonder Mountain String Band will co-headline Quincy, CA’s High Sierra Music Festival on July 5.