Career
Sinclair played TAC Cup with Oakleigh Chargers and played for Portuguese Melbourne in the Victorian Football League (VFL). Sinclair attended Scotch College with Street Kilda teammate Jack Billings. He was drafted by Street Kilda with the first pick in the 2015 Rookie Draft.
Sinclair made his American Federation of Labor-Congress debut in Round 1 of the 2015 American Federation of Labor-Congress season against Greater Western Sydney.