By ELISE RYAN Less than a year since the release of Mumford & Sons’ long-awaited fifth studio album “Rushmere,” the English folk rock band is back with a sixth: “Prizefighter,” an introspective but still upbeat return to their stomp-clap form, now bolstered by new voices. The album finds the band, made up of lead singer Marcus Mumford, Ted Dwane and Ben Lovett, alongside many collaborators. Aaron Dessner of The National coproduces all 14 tracks; features from Chris Stapleton, Gigi Perez of “Sailor Song” viral fame, Hozier and Gracie Abrams punctuate the album. Brandi Carlile, Finneas, Kevin Garrett, Jon Bellion and Justin Vernon of Bon Iver...
