Burton captain John McGrath and defenders Aaron Webster and Nathan Stanton head a list of six players released by the club.
Burton boss Paul Peschisolido is sweating on the fitness of three key defenders for the opening game of the season at Torquay.
Burton are waiting to discover the extent of Nathan Stanton's hamstring injury amid fears he has torn it.
Burton have bolstered their ranks with the double signing of Nathan Stanton and James Ellison.
Stockport defeated Rochdale 3-2 to claim their first win at Wembley in five attempts and secure promotion to League One.
Rochdale defender Nathan Stanton has committed himself to the club by penning a two-year extension to his contract.