A journeyman player, he has played for fifteen different clubs spanning five countries; England, Scotland, Wales, Northern Ireland and Greece.
Having begun his career with Chelsea, he spent time on loan with Queens Park Rangers, Huddersfield Town, Sheffield Wednesday and Brighton & Hove Albion before joining the latter permanently in 2003.
Rushden retained his registration and would not release it to another English club unless they were compensated, which prevented Knight from playing in England for three years.
He subsequently played in Greece for Thrasivoulos Fylis, Scotland for Hamilton Academical and Queen of the South and Northern Ireland for Coleraine, before joining Glentoran in January 2012.
[6] During his spell at Huddersfield, he reignited the Terriers' play-off push and formed an unlikely partnership with local hero Andy Booth, earning himself the nickname 'Neon Light'.
[7] The FA confirmed and validated the retaining of the registration, meaning Knight could not play at any level of English football until the contract had expired.
[2] Knight had not been involved in any game for the club in over 3 months and looked certain to leave Thrasivoulos when his contract expired at the end of the season.
[7] Knight joined Scottish side Hamilton Academical on 21 August 2009 and he made his SPL debut against Aberdeen as a second-half substitute the following day.
[6] In September 2010, Knight was set to return to English football with Conference side Darlington after a successful trial,[21] but his transfer was blocked by previous club Rushden, who had held onto his registration and demanded £30,000 for the deal to be completed.
[33] His stay at Glentoran was relatively short lived, as the club released him in June 2012 when they invoked a probationary clause in his contract after he allegedly made homophobic comments on Twitter.
[40] He played schoolboy football for his school, the Hackney & Tower Hamlets District team and Senrab, and had trials with Charlton Athletic and Tottenham Hotspur before joining Chelsea as a trainee.
[39] Knight's use of Twitter in May 2012 caused condemnation after he posted remarks opposing US President Barack Obama's support for same sex marriage.
[4] Knight's use of Twitter has also come under criticism, including in the national press, as he regularly engages in misogynistic tirades against women's football.
[44][45] In June 2019, he came to public attention again for repeatedly making sexist tweets[citation needed] during the 2019 FIFA Women's World Cup.
As of August 2014, Knight has appeared regularly via Facetime on the YouTube channel "Filthy Fellas" where he and fans of clubs Tottenham, Arsenal, Manchester United, and Liverpool discuss the events of the latest Premier League weekend.