Along with his twin brother Innes, Louis is a product of the Giants' academy system and both made their first team debuts over Easter 2018.
[6] Senior played a total of 17 games for Hull KR in the 2023 Super League season as the club finished fourth on the table and qualified for the playoffs.
[11] In round 10, Senior scored two tries against Leigh, with the second late on taking the game to extra time.
[14] Senior scored two tries on debut for Ireland in their 48-2 victory over Jamaica in their opening fixture of the 2021 Rugby League World Cup.
[15] In Ireland's final group stage match against New Zealand, Senior scored two tries in their 48-10 loss.