[5] Ma'asi-White was in the youth academy at Wasps RFC and made his debut for their senior side during the 2021–22 Premiership Rugby Cup before they were disbanded for financial reasons.
[6] However, he joined Sale Sharks in November 2022, agreeing a contract until the end of the 2025 season.
[8][9] Later that year he was a member of the England squad that finished fourth at the 2023 World Rugby U20 Championship.
[11][12] His father Viliami Maʻasi represented Tonga 36 times, and played at the 2003 Rugby World Cup.
He has brothers who played professional rugby but one of them, Samson, who captained England at U18 level had to give up the game after requiring a kidney transplant from his father.