Sion Bennett is a product of the Scarlets academy, and made his debut for the Llanelli-based region off the bench against Zebre in 2014.
Bennett, who can cover all three back row positions, has represented Wales on the Sevens circuit, and was also part of the Wales U20's side that finished runners-up in the 2014 Junior World Championship, narrowly losing out to England in the final.
In 2015, the back row made the move to Franklin's Gardens to join Northampton Saints, where he would link up with experienced internationals such as fellow Welshman, George North, and France number eight, Louis Picamoles.
Bennett moved on loan to Cardiff Blues during the second half of the 2016/17 campaign as injury cover, crossing for three tries during his debut campaign.
Bennett's impressive performances for Wales’ Capital Region earned him a permanent contract at Cardiff Arms Park.