On 22 July 2015, three days before they were due to play Manly in Auckland, the Warriors announced that they had signed Sao for the 2016 and 2017 seasons.[7]
Hull F.C.
He joined Super League side Hull F.C. for the 2020 season. Sao played 16 games for Hull F.C. in the 2020 Super League season including the club's semi-final defeat against Wigan.[9]
Sao played 21 games for Hull F.C. in the 2021 Super League season which saw the club finish 8th on the table and miss the playoffs. In round 20 of the 2022 Super League season, Sao was sent off for a dangerous high tackle in Hull FC's 46-18 loss against Castleford.[10][11]
Sao played 17 games for Hull F.C. for in the Super League XXVIII season as the club finished 10th on the table.[12]
In round 1 of the 2024 Super League season, Sao was sent to the sin bin during the clubs 22-0 loss to arch-rivals Hull Kingston Rovers.[13]