Tony Williams, a Parramatta junior, attended Westfield Sports High School.
Williams made his NRL debut on the wing for the Parramatta Eels against the Canberra Raiders in 2008, where he played 11 games.
Williams made three appearances for Tonga in 2008 and 2009.
At the end of 2008, Williams signed with the Manly Sea Eagles from 2009 to 2012, playing 73 games and scoring 35 tries.
In 2010, Williams was selected to play in the Prime Minister's XIII against Papua New Guinea and in 2011 was named in Australia’s Four Nations Squad.
Williams was then chosen to play for New South Wales State of Origin team in 2012.
At the end of 2012, Williams signed a four year contract with the Bulldogs from the 2013 season onwards, which would see him reunited with his former coach and mentor, Des Hasler.
The 2013 season saw Williams play 23 first grade games and scored 5 tries and also played for the NSW City squad.