The first ranking event Walker could qualify for during the 2014–15 season was the International Championship thanks to a 6–4 win over Ken Doherty. Walker drew Martin Gould in the first round and made a century and two further breaks above 50 to level at 4–4 after being 4–1 down, but then lost two frames in a row to exit the tournament. He eliminated Alan McManus 6–1 and Tom Ford 6–3 at the UK Championship and then led world number 11 Stuart Bingham 3–0, but went on to lose in a deciding frame. Walker was knocked out of the first round of the Welsh Open and Indian Open 4–2 by Mark Joyce and 4–0 by Matthew Selt. Before the start of the World Championship, Walker stated his desire to become the first player from Sheffield to play in the event, but he lost 10–6 to Stuart Carrington in the first qualifying round.