Andy Corbett scored a last-minute penalty for Burton as his testimonial match against Derby finished 8-8 on Tuesday night.
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 says the club urgently need to sign a right-back as they desperately need the position covered.
Andy Corbett has signed a new two-year contract at Burton which will see him through to his 10th season at the club.
Burton have released Darren Stride, but have agreed a new one-year contract with goalkeeper Kevin Poole.