The Bulls are not asking for transfer fees for listed duo Sean Canham and Janos Kovacs according to the PFA.
Their annual list shows both players to be available on free transfers. Also on the list is Rob Purdie, who remains in talks over a new deal at Edgar Street.
The list also contains a number of players that have not yet been officially released by their clubs. Steven Leslie is on the list despite Shrewsbury still being involved in the play-offs, as is Kris Taylor who has yet to meet returning Port Vale manager Micky Adams.