This unnamed man worked as a bodyguard for Richard Greenstreet.
During Margaret Astor's auction for the skull of Saint Peter, this man acted as a bodyguard for Richard Greenstreet. After a firefight broke out following Mr. Cromarty killing Margaret, the man shoved Greenstreet into cover.
During the firefight that followed, he mainly exchanged fire with Sam and Dean Winchester. Finally, Dean managed to hit the man twice, killing him. While Dean was distracted killing this man, Mr. Cromarty snuck up on him and tried to kill Dean only to be intercepted by Father Luca Camilleri.