TONGA international number eight Sione Vailanu will leave Warriors at the end of the current season to join United Rugby Championship side Glasgow Warriors.
Vailanu became the seventh Tongan to be capped while a Warriors player when he started against England at Twickenham in November. He won his ninth cap as a replacement against Romania in Bucharest two weeks later.
Vailanu first played in the Gallagher Premiership for Saracens having been spotted playing for Samurai in the 2017 Hong Kong Tens.