L'Estrange signed for the club in late 2003. He made his first grade début on 9 April 2004 against the Brisbane Broncos during round 5 at Sydney Football Stadium where he scored two tries.
L'Estrange played in the 2008 NRL Grand Final victory over the Melbourne Storm. Manly won the match 40-0 which as of the 2024 season is the biggest winning margin in a grand final.[7]
Bradford Bulls: 2010-13
L'Estrange signed a two-year contract with Super League club Bradford Bulls for 2010; he was seen as a replacement for Terry Newton. L'Estrange re-signed with Bradford for a three-year deal midway through the 2011 season. After the 2013 season he was released from his contract on compassionate grounds where he would later sign a one-year contract with the Sydney Roosters.[8]