He moved to Perth to further his rugby career and played for the
Nedlands club before signing with the
Western Force in 2006. Cowan played two seasons in
Japan for the
Top East League side
Shimizu Blue Sharks. He rejoined the Western Force in 2020 when the team was admitted to
Super Rugby AU, then signed with the
NSW Waratahs in 2021. Later that year, he returned to his birthplace of Wellington to play in New Zealand's
National Provincial Championship. ==Super Rugby statistics==