Mark was another one to come in on loan from Wolves and immediately impressed with his cool displays at the back. So much so that Dave Jones, manager of Wolves at the time, recalled him to Molineux and he appeared regularly after that until he started to develop a mysterious illness in 2004.
He was continually out of the side and he missed all of the 05-06 season but made three appearances at the start of the 06-07 season before getting injured again.
Mark was once the captain of the Northern Ireland U21 team.
In February 2007 he announced his retirement from the game following a diagnosis of Arthritis and took up a new vocation of Landscape Gardening. In July 2009 he made his comeback into the game by signing for Worcester City following a spell of friendly games for them.