In round 1 of the 1937 season, Brown made his rugby league debut in South Sydney's huge 63-0 win over University.[1] This was South Sydney's biggest win since the club's 67-point win over Western Suburbs in July, 1910.[2] He played the remaining 7 games of the shorterned season (due to a Kangaroos tour).
In 1938, Brown was moved from lock to second-row and front-row. Playing in all 14 of the season's games, he experienced significant success, scoring 5 tries, including a 2-try performance in round 12 to help Souths win by 30 points against St. George.[3] Brown played in Souths' semi-final match up against Eastern Suburbs, however his team lost 10-19.[4]
In 1939, he played another full season, recording 3 tries. Souths defeated St. George in the semi-finals and advanced to the club's 20th grand final appearance. Brown played in the grand final at the Sydney Cricket Ground, though Souths lost to Balmain by 29 points.[citation needed]
Brown played another full season in 1940, this time having stints at centre. Souths had minimal success over the season. In round 13, Brown scored two tries in Souths' 24-22 win over Canterbury-Bankstown.[5]
Brown signed with Balmain at the start of the 1941 season. He made his debut for the club in a 5-15 loss to Wests.[6] He made 3 more appearances in 1941. While Balmain performed well in the regular season (tying with Easts and Canterbury for 9 wins for the season), they were upset by St. George 8-32 in the semi-final. Brown did not play in the semi-final.[citation needed]
Absent in 1942, 1943 was Brown's final season in the NSWRL. He only played one game that season in a 12-point loss to Easts.[7] He concluded his career with 10 tries in 57 appearances.[8]