Right sided defender Marc Edworthy began his career in his native South West with Plymouth Argyle. He made his debut during the 1991/92 season and went on to make 69 appearances for Argyle scoring once. He was signed by Crystal Palace in the summer of 1995 and made 126 appearances for the Eagles and helped them win promotion before transferring to Coventry for £1.2million in 1998.

76 league appearances for the Sky Blues came over the next four seasons, including one league goal, three seasons of which were in the Premiership. Released by Coventry at the end of 2001/02 due to the ITV Digital disaster, he signed for Wolves and played an important role in helping them to promotion to the Premiership in 2002/03. The decision by Denis Irwin to continue for another season and the signing of Oleg Luzhny resulted in Marc being squeezed out at Molineaux.

As a free agent, he joined Alan Pardew's Reading on trial But after training and playing for the Royals for much of the summer, the appearance of Shaun Goater - or rather his wage packet - used up the last of Pardew's transfer cash and Edworthy was on his travels again.

Two days at Stoke City came to nothing as finances again intervened, leaving a phone call from Nigel Worthington as Edworthy's next hope of fixing himself up with a club. He came to Carrow Road on Thursday August 7th and signed a two year deal the following day to provide competition to Keith Briggs for the right-back spot. He made his Norwich debut the day after, coming on as sustitute for Briggs in the 2-2 draw with Bradford on August 9th. He made the right-back position his own during the successful promotion season making 45 appearances.

Although first choice throughout most of Norwich's 2004/5 season in the Premiership, Marc turned down a contract offer in December. When he lost his place to Thomas Helveg in April, coinciding with arun of good form for the Canaries, the writing was on the wall and he was informed on 18th May that his contract would not be renewed. First club Plymouth were soon linked to him but on 3rd July 2005, The People suggested that Derby and Sheffield Wednesday were competing for his signature. Marc opted for the Rams signing for them on 6th July 2005.

Out of favour following the Rams' promotion to the Premiership. Edworthy has been linked with a return to Coventry City. Unfortunately Derby were relegated to the Championship on 29th March 2008. Marc was released by The Rams in early May 2008

During the 2008 pre-season, Marc trialled with Conference side Burton Albion.

Edworthy signed for Leicester City on a short term contract in early November 2008, making his debut on 8th November 2008 in the 3-0 FA Cup victory over Stevenage. Leicester went on to win the League One title

Released by Leicester after their promotion, Edworthy spent July 2009 on trial at Football League newcomers Burton Albion managed by Paul Peschisolido. This became an initial one month contract at the beginning of August 2009. When that didn't work out, he announced his retirement, Since retiring, he has been coaching football at Repton School.