Republic of Ireland Under-17 international Mark O’Toole joined Norwich's academy in July 2006 although he made his debut for City's Under-18s on 11th March 2006. Mark was formerly with Tottenham Hotspur and plays at left-back.

He was recently described by the Republic of Ireland youth coach Sean McCaffrey as "Mark O'Toole is a left-back or a left-sided centre-half and has a very good left foot on him. He is also a very good passer and a very good crosser of the ball".

Mark was called up to the Republic's Under-19 squad in September 2007 and played in friendlies against Chile and Portugal.

n April 2008, Norwich announced that they would not be giving O'Toole a professional contract

In July 2008, Mark trialled with Barnet, playing in a pre-season victory over St Albans City.

In late November 2008, Mark signed for Grays Athletic

After playing in Ireland for Galway, Mark returned to Essex in the summer of 2010 to join Thurrock