The Mumford & Sons frontman on farming, the fallout from contact sports as a kid and the four-letter word that’s banned at home The Mumford & Sons frontman on farming, the fallout from contact sports as a kid and the four-letter word that’s banned at home B orn in California, Marcus Mumford, 39, formed the band Mumford & Sons in 2007. Two years later, they released their Brit award-winning debut Sigh No More, which included the song Little Lion Man. In 2013, Babel won album of the year at the