Hartlepool's first experience of Harry Clark came in March 1951 when the inside forward scored in a humbling 6-1 defeat at Darlington. Clark played around 150 games for the Quakers and had a brief spell at Sheffield Wednesday before joining Pools in 1958. He went on to give 2½ years of fine service, scoring 43 goals in 118 league games for a struggling Pools side. He scored twice in the record 10-1 win over Barrow and once in a sweet 5-0 win over Darlington in August 1960.