Liam began playing field hockey when he was 9 years old after an introduction program was ran at his school. Field hockey has become a family affair for Fannin, as his brother, Tom, is also a member of the Jr. Men’s Development Squad.
Liam plays his club hockey with the Vancouver Hawks Field Hockey Club, and has done so since the age of 9. He made his first junior appearance in 2013 against the USA in Los Angeles.
Liam spend a season playing in England for the Wimbledon Wanderers, and states that his greatest field hockey memory was scoring a hat-trick in his final game for the Wanderers. His role model is New Zealand rugby superstar Sonny Bill Williams.