Wayne Thomas and Dennis Souza are the latest to learn that they have no future at Doncaster Rovers.
Doncaster have handed Dennis Souza a contract until February after the defender impressed on trial.
Doncaster are considering a move to sign ex-Barnsley defender Dennis Souza at the end of a trial.
Dennis Souza, Marciano van Homoet, Diego Leon and Kyle Letheren will all exit Barnsley this summer.
Watford maintained their position at the top of the Championship with a 2-1 win over strugglers Sheffield Wednesday.