Experienced scrum-half Willi Heinz joined Warriors from Gloucester Rugby ahead of the 2021/22 season.
Heinz was capped by England 13 times between 2019 and 2020 and was a member of the squad that went to the 2019 Rugby World Cup in Japan.
He came to England having captained Canterbury and represented Crusaders in Super Rugby and also had a spell as captain at Gloucester.
Heinz marked his Warriors debut with a try in the victory over London Irish at Sixways in September 2021 and added another the following week to help secure two bonus points at defending champions Harlequins.
A groin injury then kept Heinz sidelined for five months but he returned to action against London Irish at the Brentford Community Stadium in March 2022.
He left Warriors two weeks later and returned to New Zealand for family reasons.
