Southend United will not make a decision on Nile Ranger's future until a Football Association investigation is completed.
French striker Marc-Antoine Fortune extends his deal with Southend United until the end of the 2017-18 season.
Simon Cox's last-gasp winner hands Southend victory over Rochdale in a match that both sides end with 10 men.
Southend are set to have left-back Ben Coker in contention again for the visit of Rochdale.
Southend United say striker Nile Ranger faces suspension by the League One club after a "breach of discipline".
League One leaders Sheffield United make it six wins in a row as they end Southend's unbeaten 13-match run.
Southend are again set to be without winger Stephen McLaughlin because of an ankle injury for the visit of Sky Bet League One leaders Sheffield United.
League Two promotion-chasers Plymouth Argyle sign former Southend United defender Jakub Sokolik.