Samuel Oji has joined Hereford on a free transfer following a success trial.
Leyton Orient striker Jabo Ibehre is one of six players who will be released by the club this summer.
Sam Oji is waiting to discover if he will be offered a long-term contract by Leyton Orient.
Sam Oji is to return to Leyton Orient on a six-month contract after being released by Birmingham.
Leyton Orient have come to an agreement with Birmingham City over the extension of Sam Oji's loan.