Who Is Cassidy? Barry Adrian Reese, known as Cassidy, is a Philadelphia rapper whose technical battle rap credentials were among the best of the mid-2000s mainstream. Hotel (2004) was a top 10 hit. His debut Split Personality debuted at #2 on the Billboard 200. A 2006 involuntary manslaughter conviction, stemming from a 2005 shooting, interrupted his career. B.A.R.S. (2012) was his comeback album, debuting at #121 with approximately 4,000 copies. Quick Stats Career Ov