On 18 December 2015, McFadden signed a short-term deal until the end of January 2016. That arrangement expired at the end of January, with McFadden expecting to move on to the USA. On 13 February, McFadden signed a new deal to stay to the end of the season. On 19 March, he was ruled out for the remainder of the 2015–16 season, after suffering a broken ankle in training. On 26 July 2016, Motherwell announced that McFadden had been appointed as the club's assistant-manager, whilst also continuing as a player until the summer of 2017.