Former Ireland star Aiden O'Brien opens up on the reality of pre-season as a free agent
![Former Ireland star Aiden O'Brien opens up on the reality of pre-season as a free agent](https://i2-prod.mirror.co.uk/incoming/article33254122.ece/ALTERNATES/s615/0_GettyImages-1244148949.jpg)
Former Millwall forward and Republic of Ireland international Aiden O'Brien has been using training facilities provided by the PFA this summer as he searches for a new club