Barry Adrian Reese (born July 7, 1982), better known by his rap name Cassidy (also known as "The Problem" and "The Hustla") is a popular rapper from Philadelphia, Pennsylvania. He was born and raised in North Philadelphia. He was in a group called Larsiny together with his home-town-friends Cal Akbar and Shiz Lansky. Cassidy rose to prominence as a battle rapper and started appearing on mixtapes. Producer Swizz Beatz signed him to his Full Surface label distributed through J Records and featured him on Swizz's 2002 album Presents G.