John Mayer is an American singer, songwriter, and guitarist. In 2003, he won the Grammy Award for Best Male Pop Vocal Performance for his single "Your Body Is a Wonderland". He released his latest album Sob Rock, inspired by 1980s soft rock music, in July 2021. John Mayer has hand signed this 2021 Sob Rock CD 4x4 Insert Card. Beckett/BAS Encapsulated #00014325041.