That’s not Dinosaur Jr. it’s Lou Barlow’s band the missing men. Lou Barlow plays his songs as the opening act and then he plays the Dinosaur Jr. show. The Missing Men are actually the Minute Men; Mike Watt’s band, And yes Mike Watt is playing. Tonight Bob Mould will join them in Philadelphia.
Edit: His name is Tom Watson and its the Second Men not the Minute Men. And it looks like Mike Watt is the Missing Man. My bad!