Barnet release Mark Randall but offer deals to Stack, N'Gala and Nelson
Midfielder Mark Randall will leave League Two side Barnet when his contract expires this summer.
The 26-year-old former Arsenal trainee scored two goals in 12 appearances after joining the Bees in January.
Goalkeeper Graham Stack and defenders Bondz N'Gala and Michael Nelson have been offered new deals.
Manager Martin Allen made Shaun Batt, Tom Champion, Ben Tomlinson and Mauro Vilhete available for transfer earlier this month.
Development squad players Joe Gater, Ryan Gondoh and Charlie Kennedy have also been released by the north London club.