Derby County: Callum Ball one of five released by Rams
Derby County have released five players, including striker Callum Ball, just before their contracts with the club were due to expire.
The quintet have been released early to allow them to find new clubs.
Ball, 21, scored three times in 31 appearances for the Rams.
He also played first-team football while on loan with Coventry City, Torquay United and, most recently, Notts County.