Following his loan spell with Aviva Premiership side Bath Rugby, Knight has been offered a permanent contract with the English outfit.
Head Coach, Kingsley Jones commented: “Shaun was a pleasure to work with, he is a consummate professional and very good young player.
“However due to the excellent performances of Brok Harris coupled with the progression and emergence of our other three Welsh qualified props Lloyd Fairbrother, Leon Brown and young Chris Coleman, future opportunities would be limited.
“Bath is an excellent opportunity for Shaun to play rugby at the top level and we’d like to wish him well for the future.”