Dalglish continued his goalscoring form in the reserves into the next season, scoring 23 goals. A highlight of his season came in the Reserve Cup Final against Rangers; Dalglish scored one goal in a 4–1 win in the first leg, then in the second leg scored a hat-trick in a 6–1 win to clinch the cup. Still not a first-team regular, Dalglish was in the stands when the Ibrox disaster occurred at an Old Firm match in January 1971, when 66 Rangers fans died. On 17 May 1971, he played for Celtic against Kilmarnock in a testimonial match for the Rugby Park club's long serving midfielder Frank Beattie, and scored six goals in a 7–2 win for Celtic.