Full name: Aiden Antony O'Brien
Shirt number: #22
Been at Millwall since: July 1st, 2011
O'Brien is a player who continues to divide opinions between Millwall fans. His finishing ability and moments of supreme individual skill make him a force to be reckoned with, but many do not believe in the academy product.
He has been a key fixture in the side since Neil Harris took over around two and a half years ago, scoring thirty one goals (predominantly from a wide position) in 135 games for the Lions.
His red card against Wolves just two days ago was the first of O'Brien's career, with him only having picked up nine yellow cards in 160 matches prior to that. I'm sure the Arsenal fan is a player who will continue to spilt opinion in South Bermondsey, but there is no doubting his value to the team when in form.