Teddy Stiga was born in Sudbury, Massachusetts.
Stiga played for the USA U17 NTDP in 2022-2023. He played 49 games and recorded 12 goals and nine assists. He was selected to play in the WU17 for Team USA and had one goal and two assist with seven games.
This past season for the USA U18 NTDP team, Stiga had a very productive season and had scouts moving him up draft boards. In 61 games he had 36 goals and 43 assists. He kept up his momentum in the WU18 tournament, tallying six goals and five assists in seven games.
Stiga is committed to play at Boston College in 2024-2025.