Accrington Stanley manager John Coleman has taken West Ham United striker Sean Maguire on-loan.
Maguire will be with Stanley until 21 December following a recent spell under Coleman at Irish side Sligo Rovers.
"As soon as I heard John was getting the Accrington job I wondered if he would bring me with him," O'Sullivan told the club website.
"The first day he got the job he rang me and asked me if I wanted to come, which I couldn't turn down."
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