Barnet release Chiro N'Toko, Liam O'Brien & John Oster
Veteran midfielder John Oster is among three players released by Barnet following their relegation from League Two.
The 34-year-old scored two goals in 28 appearances for the Bees after joining the north London club in September.
Defender Chiro N'Toko and keeper Liam O'Brien are also departing Underhill.
N'Toko featured twice after joining in February while O'Brien played four times before his season was ended by injury while on loan at Hastings Utd.
Harry Crawford, Luke Gambin, Graham Stack, David Stephens and Mauro Vilhete are all under contract for next season.