Along with his twin brother Louis, Innes is a product of the Giants' academy system and both made their first team debuts over Easter 2018.

[5] Senior was limited to only six games with Huddersfield in the 2023 Super League season as the club finished ninth on the table and missed the playoffs.

[6] On 17 December 2020, it was announced that Wakefield Trinity and Huddersfield had agreed to extend Senior's loan period to cover the 2021 season.

[7] In round 20 of the 2023 Super League season, Senior scored four tries for Wakefield Trinity as they upset Warrington 42-6.

[8] On 11 October 2023, it was announced that Senior would join the Castleford Tigers on a season-long loan for the 2024 season.