Big Cass Karma Entrance Music Theme Song Download is available for free in mp3. Big Cass Karma. William Morrissey, more famous as Big Cass and Big Cazz, is an American professional wrestler best known for his tenure with the professional wrestling promotion WWE. He played basketball during his school days and featured in the Senior Classic All-Star game of the Catholic High School Athletic Association. He also played as a centre for the ‘NYU Violets’ and co-captained the team during his final season, before turning his focus to wrestling.