Crichton made his debut for Canterbury-Bankstown against the New Zealand Warriors in Round 1 scoring a try in a 40–6 loss. The following week, Canterbury were defeated by arch rivals Parramatta 36–16. As a result, Crichton was demoted to reserve grade by coach Dean Pay for the following week.[8]
On 6 May, Crichton was selected for the Canterbury Cup NSW residents side to play against the Queensland residents representative team.[9]
2020
Crichton was placed on report in the opening round of the 2020 NRL season against arch rivals Parramatta after hitting Maika Sivo with a late high tackle. Canterbury would go on to lose the match 8–2.[10]
2021
Crichton was ruled out of the entire 2021 NRL season after suffering a knee injury in pre-season training.[11]
2022
Crichton only made one appearance for the Penrith first grade side in 2022. Crichton spent the majority of the year playing for the clubs NSW Cup side. Crichton played for Penrith in their 2022 NSW Cup Grand Final victory over Canterbury.[12]