 He impressed manager Kevan Broadhurst and subsequently made his debut at the end of the 2001–02 season in a 2–2 draw against Cambridge United.The following season, Morison featured regularly as a substitute, playing a total of 15 games, scoring his first goal for the Northamptonshire side in a 2–2 draw against Plymouth Argyle.The 2003–04 season saw Morison feature in only five games, scoring once.