[11][12] In June, Sipley signed a two-year contract with the Manly Warringah Sea Eagles for the 2018/2019 seasons.

[13] On 19 May, Toafofoa Sipley made his club debut for Manly Warringah against the Melbourne Storm in the 24-4 win at AAMI Park.

[15] Sipley made 10 appearances for Manly Warringah in the 2019 NRL season as the club reached the finals.

[20] Sipley played 15 matches for Manly in the 2023 NRL season as the club finished 12th on the table and missed the finals.

[21] Sipley was limited to only 13 games for Manly in the 2024 NRL season as they finished 7th on the table and qualified for the finals.