Bradford have released Steven Schumacher, Richard Edghill, Marc Bridge-Wilkinson and Xavier Barrau.
Midfielder Schumacher made 48 appearances for the Bantams last season, scoring seven goals.
Barrau scored twice in just three appearances - two as substitute - after arriving from Airdrie.
Managerless Bradford also released Joe Brown, John Swift, Russell Howarth, Patrick McGuire, Ben Muirhead and Nick Smith a fortnight ago.
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