[2] Armitage played at Brixham and earned a scholarship to Wellington College before joining the London Irish Academy.
[3] He made his debut against Sale Sharks on 5 November 2010 becoming the third Armitage brother to play for the club after Delon and Steffon.
[12] In September 2020 it was announced that Armitage had signed for new Canadian club Ottawa Aces for their inaugural season in the RFL pyramid in 2021.
[16] On 21 October 2021 Toulouse announced that Armitage had signed a new one-year contract and would be part of the squad for 2022, their first season in Super League.
[17] On 15 October 2023, Armitage played in Toulouse Olympique's upset loss in the Million Pound Game against the London Broncos.