Aiden O'Brien has sealed a deadline day move to Sunderland's League One rivals Portsmouth.
The forward has been a peripheral figure this season and was keen to play regular first-team football, with the Black Cats agreeing that he could leave Wearside this month.
O'Brien's contract with Sunderland was due to expire in the summer but his time has been cut short and he has instead signed a short-term deal with Pompey until the end of the season.
