When did Zac Brown become the king of grunge? Country’s grassroots superstar has been rubbing elbows with Seattle alt-rock royalty a lot in recent years: He guested on Foo Fighters’ Sonic Highways (maybe you saw it on HBO?), and he crossed over to modern rock radio by recruiting Chris Cornell to sing on his recent single “Heavy Is The Head” (maybe you saw it on SNL?). And lately Brown’s been bringing his love of sludgy Pacific-Northwest alt-rock to the concert stage. Saturday at Boston’s Fenway Park, Zac Brown Band covered Pearl Jam deep cut “Porch,” and the following night they serenaded the same venue with Temple Of The Dog’s seminal “Hunger Strike.” Watch footage of both performance below.

Country really is the new classic rock.