Amos Leon Thomas Jr. , known professionally as Leon Thomas, was an American jazz and blues vocalist, born in East St. Louis, Illinois, and known for his bellowing glottal-stop style of free jazz singing in the late 1960s and 1970s.

Amos Leon Thomas Jr., known professionally as Leon Thomas, was an American jazz and blues vocalist, born in East St. Louis, Illinois, and known for his bellowing glottal-stop style of free jazz singing in the late 1960s and 1970s.
[Spotify] Appears on album "Mutt". [Genius] "MUTT" is the title track and lead single from Leon Thomas's recently released second album. Produced by D. Phelps and Freaky Rob, "MUTT" emerged from the ashes of a bad breakup when Thomas noticed similarities between himself and the dog his ex had given him during their relationship.

Mutt earns RIAA 2x Platinum for Leon Thomas, recognizing 2,000,000 units on October 9, 2025.