Because of the Eagles' Ruck depth, with Nic Naitanui, Tom Hickey and Nathan Vardy already established rucks at the club, Jamieson was drafted as a developing ruck/forward, who would be spending time developing in the WAFL to be ready for AFL level. Unfortuantly, due to the coronavirus pandemic, the 2020 WAFL season was cancelled, haltering Jamieson's development. Jamieson was able to play 13 games during the 2021 WAFL season, playing ruck with stints as key defender. On 5 May 2021, West Coast, impressed with Jamieson's development resigned him until the end of the 2022 AFL season."Eagles announce four new signings" - Zero Hanger. Published 5 May 2021. Retrieved 20 June 2022
