He previously played for the Wests Tigers and the Manly Warringah Sea Eagles in the National Rugby League.

[5][6] On 30 September 2012, he played in the Jets' 2012 New South Wales Cup Grand Final win over the Balmain Ryde-Eastwood Tigers.

[11] In the absence of regular halfback Luke Brooks, Littlejohn made his debut for Wests Tigers in round 1 against the New Zealand Warriors.

For the opening three games of the season, Littlejohn was named on the bench and played hooker when he took the field, covering for injuries to Jacob Liddle and Matt Ballin.

Coach Andrew Webster said, "He was one of our real leaders during pre-season training, the boys love having him around and enjoy playing with him.