Brown who is of Māori Descent started his rugby league career playing for the Riccarton Knights in Christchurch and attending Papanui High School.

[9] In the 2014 NRL season, Brown played 22 games including Penrith's preliminary final defeat by Canterbury-Bankstown at ANZ Stadium.

[11] Brown was released by Manly-Warringah Sea Eagles at the end of the 2018 NRL season which saw the club finish second last after a horror year on and off the field.

[16] Lewis Brown made his international debut for the New Zealand national rugby league team in the 2011 ANZAC Test against Australia.

Made a tremendous impact within minutes of taking the field during the first half of the Australia V. New Zealand Four Nations game, scoring an impressive try as a result of a Greg Inglis knock on.