California native Lincoln Sii played in Major League Rugby between 2021-2025. He represented Rugby ATL (2021-2023) and Rugby FC LA (2024-2025).

Sii played gridiron football during his time at Great Oak High School from 2012-2015. He began playing rugby in 2015 with the Temecula Mountain Lions. Sii enrolled at Grand Canyon University and played rugby during his time there, graduating in 2020. He declared for the 2020 draft but was not drafted to the surprise of many. As a result, Sii was able to sign with any MLR team, and he joined the Rugby ATL system, playing with the Pathway 404 academy side. Sii earned his MLR debut from the bench in 2021, the year that ATL finished as Runners-Up to the LA Giltinis. Sii earned 15 appearances with the RATLers between 2021-2023, including a career high of 10 in 2023, when he also earned his first MLR start.

Following the 2023 season, Rugby ATL was sold to new owners, relocated to Los Angeles (the Giltinis has since folded), and rebranded as Rugby FC LA. Sii followed the team to his home state of California, and earned 5 appearances for RFCLA in their inaugural season in 2024. On December 12th, 2024, RFCLA announced the return of Lincoln Sii for the 2025 MLR season.

Achievements

• 2021 MLR Runner-Up: Rugby ATL