Having missed the 1959–60 season opener in August, Liddell replaced Bimpson for the match against Bristol City and scored a brace in a 4–2 win. He had numerous chances to complete a hat-trick, including two disallowed goals and a penalty taken by Jimmy Melia which the crowd had urged Liddell to take. He retained his place until an injury sustained in September granted Roger Hunt the opportunity to score on his league debut against Scunthorpe. Recurring injury further disrupted Liddell's season after his return against Middlesbrough and damage to knee ligaments in October rendered him unavailable for four months. Phil Taylor resigned in December due to deteriorating performances and was succeeded by Huddersfield's Bill Shankly. After Liddell recovered, Shankly selected him to play against Derby County in February, but the match had to be abandoned because of fog. He completed the next match, against Plymouth Argyle, and played in ten successive games, scoring his final goal for the club in a 5–1 defeat of Stoke in March.