 A month later, he scored his first goal for Millwall in a 3–1 victory over Huddersfield Town.Playing in a deeper role than when at Stevenage, Morison struggled for goals, but made the majority of Millwall's goals throughout October, whilst also netting in a 5–0 win over Tranmere Rovers.In December 2009, he scored a 91st-minute winner in a 3–2 victory over Milton Keynes Dons, and also scored a similar goal in a 4–0 win over Staines Town in the FA Cup.