Walker made his debut for Bolton Wanderers against Leeds in January 2015 and went on to make twenty appearances for the Trotters, scoring one goal.
Last summer he joined Bury on a season-long loan and made fifteen appearances for the Shakers, scoring one goal.
The Bolton academy graduate was released from the Macron Stadium at the end of June and earned himself a short-term deal with FC United`s league rivals Stockport County in August.