Harry Middleton has joined League Two outfit Port Vale after Doncaster Rovers agreed to terminate his contract.
The Doncaster-born midfielder was placed on the transfer list at the end of last season.
He signed a three-and-a-half year deal until 2019 in December 2015.
Middleton, 22, was given his Doncaster debut in 2012 and went on to make 79 appearances for the club.
He has penned a one-year deal with the Valiants.