A left-back, the Spurs website stated that this Academy player previously played for Charlton Athletic. Born in London, he was brought up in Redbridge and was a pupil at Roding Valley High School. He represented Harlow and West Essex at Schools football. He made three starts for their Under-17s, as well as four substitute appearances, and played once for the Under-19s in 2002/03. Other reports state that he was also at Arsenal and West Ham as a youngster.

An article on his teammate Charlie Daniels in Spurs magazine (March 2004) reveals that they were both at Norwich together as youngsters.

Released by Spurs at the end of the 2004/5 season, Mark joined Southend on trial and then as a scholar. In December 2005, he was loaned to Conference South side Lewes to get work experience.

Released by Southend at the end of the 2005/6 season, Mark joined Grays Athletic on a one year contract in August 2006. On 23rd November 2006, he was loaned to Crawley. He extended this for another month in early January 2007.

On 16th February 2007, St Albans City manager Colin Lippiatt brought Wright to Clarence Park initially on a month's loan. "He's a young lad, with a nice left peg and he's had a decent grooming at Spurs. He's not really had a look in at Grays but that's nothing to do with me as I don't pick their team. He should give us a nice balance down the left and provide cover at both left-back and left midfield."

On 20th March 2007, Mark was loaned out again, this time to Rushden & Diamonds. Mark was released by Grays in May 2007 and joined Bishops Stortford on trial in July 2007 along with Tom Williams (another former Grays player), Steffan Gaisie, Callum Kearns (both ex-Southend United) and Ronnie Henry (ex-West Ham United)

Mark signed for Bishops Stortford but moved to Fisher Athletic on 11th December 2007. He later trialled for AFC Bournemouth before joining Thurrock but returned to Stortford in February 2009. .

On leaving football, he went into night club promotion and starred in the ITV show "The Only Way Is Essex" which centred on his club Deuces bar and Lounge

In September 2011, Mark joined Heybridge Swifts but quit after just 2 games.

In November 2011, Mark appeared on "I'm A Celebrity Get Me Out of Here" finishing second and the twelfth series of "Strictly Come Dancing" where he finished fourth. He is also a DJ on Heart FM.and has hosted or guested on many TV programmes.

Wright made his return to professional football on 14 December 2020 signing for Crawley Town and made his professional debut, at the age of 33, as a 90th minute substitute as Crawley beat Leeds 3-0 in the Third Round of the FA Cup on 10th January 2021. He made his only start in their league defeat by Harrogate in February 2021 but was taken off at half-time. He was one of three players released by Crawley on 18th May 2021 along with Stuart Nelson and Joe McNerney