Mason may be best known for his 2005 portrayal of Halpern White on the FX original series The Shield. Mason had a recurring role on Prison Break as a prisoner named Sammy. Laurence said "I had a great time filming Prison Break."He played the role of Andre in Burn Notice episode, "Unpaid Debts". He also made numerous appearances on HBO's now defunct sketch comedy show Hardcore TV in the skit "RastaPiece Theater" as RastaMan, who does a Rasta-styled Masterpiece Theatre.