Aiden O'Brien transfer: what we know
Aiden O'Brien's move from Millwall to Sunderland is recorded as completed, with the database showing a free transfer transfer.
The TransferNews database currently lists Aiden O'Brien as moving from Millwall to Sunderland. The record is classified as a free transfer move and carries a status of completed.
No reliable public fee is attached to this record, so the financial terms remain listed as undisclosed. The recorded transfer date is July 30, 2020.
This dossier links the move to 1 supporting report. Player, club and league profiles below provide the wider transfer history and current market context.