According to the Ultimate Book of Non-League Players , Mark Barry is a left sided midfielder who as a youngster was with both Norwich City and Cambridge United. He joined Billericay Town in February 1995. According to Mike Wilson's excellent "Statistical Review of the Ryman Football League 1997/98", Mark made 25 appearances (4 as substitute) in season 1997/98 scoring 4 goals.

The February 1999 edition of Team Talk magazine informed readers that Mark had joined fellow Ryman Leaguers Canvey Island. His stay there lasted less than a year as the December 1999 issue of Team Talk reported his move to Purfleet. Fourteen months later, Mark was on his travels again, allegedly joining Grays Athletic at the end of February 2001 although he was quickly located at Great Wakering Rovers. Since then, he has joined East Thurrock United before moving in July 2006 to Westview Essex Senior League club Barking