Michael Spillane does not feel he was given a fair crack of the whip under Southend boss Phil Brown before being released.
Southend manager Phil Brown has confirmed the club have offered new deals to four key players.
Bilel Mohsni is among five Southend players to have been shown the door by Shrimpers manager Phil Brown.
Gillingham had three players named in the PFA League Two Team of the Year on Sunday night, with Port Vale boasting two representatives.
Phil Brown was disappointed with the manner of Morecambe's goal which condemned Southend to a 10th home game in a row without a win.
Andrew Fleming's goal secured Morecambe a 1-0 win at Southend to extend the Shrimps' unbeaten record against the Essex side.
Team news for Saturday's League Two clash between Southend and Morecambe at Roots Hall.
League Two side Southend have offered professional contracts to teenage trio Mitchell Pinnock, Seedy Njie and Ryan Auger.