Walton has made nine appearances for Barnsley this season, keeping two clean sheets. "Jack is an excellent, experienced goalkeeper who has worked with (goalkeeper coach) Kevin Pilkington before," manager Rob Edwards told the club website. "He's got plenty of experience playing in the Championship with Barnsley, and we know that if anything were to happen to Ethan Horvath, we'd be very comfortable with the competition and cover in that area of the pitch, with James Shea coming back to fitness too."
Non-league Wrexham are still in the competition and face Sheffield United in a replay following their thrilling 3-3 draw
Can League One’s Derby County cause an upset against Premier League opponents West Ham?