John Clark is a former professional footballer from Scotland, known for his defensive skills on the field. He played primarily as a centre-back and had a notable career in the Scottish Football League during the 1960s and 1970s. Clark is best remembered for his time with Celtic FC, where he contributed to the team's success, including winning multiple league titles and the prestigious European Cup in 1967. After leaving Celtic, Clark continued his career with other clubs, including Dunfermline Athletic and St. Johnstone. His experience and leadership made him a respected figure in Scottish football. Following his playing days, he transitioned into coaching, sharing his knowledge of the game with younger players.