Keane is undoubtedly the biggest disappointment overall. He came with good Premiership pedigree and not once did he show it in a red shirt.
Of the players still at the club then Ryan Babel wins this vote hands down. Last season he showed glimpses of being possibly one of the most promising attacking talents in Europe, yet this season to me he's starting to look more and more like Stan Collymore. For me he'll do well not to let the door hit him on the arse on his way out of the club come the summer.