On 17 November 2021, it was reported that he had signed for Wigan Warriors in the Super League[13]
On 28 May 2022, he played for Wigan in their 2022 Challenge Cup Final victory over Huddersfield.[14]
In round 11 of the 2023 Super League season, Thornley made his first appearance for Wigan in eleven months and scored two tries for the club in their 14-10 loss against Hull F.C.[15]
Wakefield Trinity
On 25 October 2023, it was confirmed that he would join Wakefield Trinity for the 2024 season on a one-year deal.[16]