Brown made his professional debut on 11 July 2015, scoring a four-round points decision (PTS) victory against Ibrar Riyaz at the Chase Leisure Centre in Cannock, Staffordshire.

[1] After compiling a record of 8–0 (1 KO) he faced reigning champion Glenn Foot for the English light-welterweight title on 16 July 2017 at the Stadium of Light in Sunderland.

[5] His next fight was against Darragh Foley for the vacant IBF European light-welterweight title on 14 December 2018 at the York Hall in London.

[6] Brown made a successful defence of his IBF European title with a ten-round UD victory against Bilal Rehman in March 2019,[7] before challenging Commonwealth light-welterweight champion Philip Bowes, with the vacant British light-welterweight title also on the line, on 2 September 2020 at the Production Park Studios in South Kirkby, West Yorkshire.

In a fight which saw both men suffer cuts and Bowes receive a point deduction in the eighth round for excessive holding, Brown secured a twelve-round UD victory to capture the British and Commonwealth titles.