Career
Viiask started his senior club career in 2000 in Ehitustööriist. In the next year signed with Tartu Ülikool/Rock and played there until 2007, when he signed with Estonian rival British Columbia Kalev/Cramo. He has also played for TTÜ KK and Kuremaa Saskatchewan. Currently he is back with Tartu Ülikool/Rock.
Tartu Ülikool/Rock British Columbia Kalev/Cramo.