He joined Wycombe Wanderers in July 2016 but initially failed to win a first-team place and instead spent time on loan at Eastleigh and Cheltenham Town.

[5] A Wolverhampton Wanderers supporter, he was with the club's youth academy between the ages of 12 and 18, but never played a first-team game for Wolves before manager Dave Jones allowed him to leave on a free transfer to Welsh Premier League side Welshpool Town in summer 2003.

[10][11][7][4] Brown joined Cheltenham Town after being signed by management team John Ward and Keith Downing, who had been on the coaching staff at Molineux.

[12] He did not feature in the rest of the 2005–06 campaign and was an unused substitute in the play-off final as Cheltenham secured a place in League One with a 1–0 victory over Grimsby Town at the Millennium Stadium.

[17] He was given the number 1 shirt for the 2009–10 season following the departure of Higgs, and made 44 appearances as Cheltenham finished just one place and four points above relegation into non-League.

[25][26] He was an ever-present in league and cup competitions across the 54 game campaign as Cheltenham again secured a play-off place, this time losing out 2–0 on aggregate to Northampton Town at the semi-final stage.

[35][36] However, lapses in important defeats in the League Cup semi-final and in a top-of-the-table match against Celtic, which effectively ended Aberdeen's trophy chances, led to Jamie Langfield taking over in goal.

[37][38] Brown took the starting place back for the final eight matches of the 2014–15 season as Aberdeen comfortably achieved UEFA Europa League qualification with a second-place finish.

[43] On 26 July 2016, Brown signed a two-year deal with League Two side Wycombe Wanderers after impressing manager Gareth Ainsworth on a trial basis.

[45] He spent a month at Ten Acres as manager Ronnie Moore needed cover for regular custodian Ryan Clarke, who had injured his elbow.

[49] He came close to signing with Cheltenham permanently but the deal fell through after manager Gary Johnson refused to pay the nominal fee of £5,000.

[58] On 9 March, he saved a first-half penalty from Mansfield Town's Nicky Ajose to inspire a 2–1 win, in what was John Askey's first victory as "Valiants" boss.

[60] He won all four of the club's Player of the Year awards for the 2018–19 season after keeping a total of 16 clean sheets in a struggling team and signed a one-year contract extension in May.

[61][62] He was named on the EFL Team of the Week after keeping a clean sheet in a 1–0 win over local rivals Crewe Alexandra at Gresty Road on 2 November.

[71] On 9 June 2021, Brown agreed a two-year deal to join Exeter City as a player-coach, becoming Matt Taylor's second signing of the summer.

[73] He played one game in the 2021–22 season and was an unused substitute on the final day of the campaign as a 1–0 defeat to former club Port Vale at St James Park cost Exeter the league title.

[76] Taylor was sacked on 13 November 2023, with the club 22nd in the Championship, and Brown was put in co-caretaker charge alongside Wayne Carlisle and Dan Green.