Falloon was born in Sydney, New South Wales, Australia.

Falloon played with the South Sydney Rabbitohs for 3 seasons making 25 appearances.

Falloon spent most of his playing time during this period with Souths feeder side the North Sydney Bears.

On 15 February 2015, Fallon was suspended as revelations unfold pertaining to the Karmichael Hunt/Smith/Seers cocaine trafficking investigation – Court date 5 March 2015.

[5] On 23 October 2015, Falloon signed a one-year contract with Super League champions, Leeds Rhinos, starting in 2016.