Age: 29
Club: North Carolina Courage
Place of birth: Cork
Ireland debut: Wales, 2011
If Katie McCabe is the heart of the side, O'Sullivan is the brains. One of the most respected players in the NWSL, O'Sullivan's creativity and eye for a pass have regularly swung games Ireland's way - not least in Scotland where she split the hosts open with a through ball that allowed Amber Barrett to make history.
