Seyfarth made his debut in round 3 of the 2020 NRL season for the Wests Tigers against the Cronulla-Sutherland Sharks following the resumption of the sport due to the COVID-19 pandemic.

[6] Seyfarth played a total of 12 games for the Wests Tigers in the 2021 NRL season as the club finished 13th and missed the finals.

[7] Seyfarth played a total of 17 matches for the Wests Tigers in the 2022 NRL season as the club finished bottom of the table and claimed the wooden spoon for the first time.

[8] Seyfarth played a total of 14 games for the Wests Tigers in the 2023 NRL season as the club finished with the wooden spoon for a second straight year.

[10] Seyfarth played 23 games for the Wests Tigers throughout the 2024 NRL season as the club finished with the Wooden Spoon for a third consecutive year.