Brad Thyer made his Cardiff debut against Scarlets in the 2014 Anglo Welsh Cup, after representing Wales under-20.
After a breakthrough campaign for the loosehead prop in 2017/18, Thyer featured as a replacement in the 2018 Challenge Cup final victory over Gloucester in Bilbao.
Thyer spent the opening weeks of the 2021/22 season on loan with Glasgow Warriors, later returning to his home club.