Photograph by C. Taylor Crothers for Rolling Stone

The Dave Matthews Band recently rocked two gigs at Boston’s Fenway Park, where they were joined onstage by Willie Nelson, debuted six songs from their new Number One album Big Whiskey and the GrooGrux King and mixed in classics like “Jimi Thing” and “Ants Marching” alongside a covers of “All Along the Watchtower” and “Burning Down the House.” Rolling Stone’s Evan Serpick was on the ground with DMB for an On the Road feature (find it in our new issue), and spoke to Matthews backstage about the inspiration behind many of the songs on Big Whiskey: saxophonist LeRoi Moore, who died last year.

Matthews takes on through a handful of the album’s new tracks here:

• Dave Matthews Shares the Stories Behind “Big Whiskey and the GrooGrux King”

Plus, check out photos of the band chilling with Nelson backstage and rocking alongside the legend onstage in exclusive photos:

• Dave Matthews Band: On the Road at Fenway Park With Willie Nelson