CJ Fly has been played on NTS shows including Livin' Proof, with Hardknock first played on 29 March 2017.

Chaine Downer Jr. (born July 6, 1993), better known by his stage name CJ Fly, is an American rapper from Brooklyn, New York City. He is a founding member and the oldest member of the hip-hop collective group Pro Era. Throughout 2012 and 2013, he was featured on many of the collective's projects and towards the end of 2013, he released his critically acclaimed mixtape Thee Way Eye See It.