While at Southend United, he was made player-manager during the 1986–87 season. When Paul Lambert left Colchester United three games into the 2009–10 season, Clark was brought in by caretaker manager Joe Dunne as assistant manager until Aidy Boothroyd's appointment as manager.
References
^Dunk, Peter, ed. (1987). Rothmans Football Yearbook 1987–88. London: Queen Anne Press. p. 340. ISBN978-0-356-14354-5.
^Triggs, Roger (2001). The Men Who Made Gillingham Football Club. Tempus Publishing Ltd. p. 89. ISBN0-7524-2243-X.
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