|Full name||Henry Haddock|
|Date of birth||28 July 1925|
|Place of birth||Glasgow, Scotland|
|Date of death||18 December 1998(aged 73)|
|Place of death||Rutherglen, Scotland|
|Playing position||Left back|
|1954–1956||Scottish League XI||7||(1)|
|* Senior club appearances and goals counted for the domestic league only|
Haddock was born in Glasgow and as a left back began his senior career at Exeter City. He was previously with the RAF stationed in the midlands. Haddock also appeared for Renfrew Juniors. He joined Clyde in September 1949 and became a reliable fixture in the side over the following 13 seasons, latterly as captain. He enjoyed his fair share of ups and downs during this period: the Bully Wee were relegated in 1950–51, 1955–56 and 1960–61 although they enjoyed an instant return as Second Division champions on each occasion. Haddock also helped his side reach two Scottish Cup Finals, both of which were won. In 1954–55, Celtic were defeated 1–0 in a replay, while in 1957–58, Hibernian were defeated 1–0 at the first attempt.
Haddock died in Rutherglen, Glasgow in 1998. He is survived by his sons Robert and Gerard and daughter Josephine. His wife Helen died in 2011, and eldest daughter Helen-Marie died in 2004.
Haddock's international debut came against the Mighty Magyars team in 1954. His international career was somewhat less auspicious, as Scotland won only 1 of the 6 games he featured in. This included two heavy defeats by England, 7–2 in 1955 and 4–0 in 1958. Following the 7–2 defeat, Haddock was publicly praised by Stanley Matthews for his refusal to resort to foul play. In 14 years as a senior and international footballer, Haddock was never booked, sent off, or even admonished by a referee. The latter match would prove to be his final international appearance, as despite his selection in the 1958 FIFA World Cup squad, he did not feature in the finals in Sweden.
In addition to his six full international appearances, Haddock was also selected to play in seven Scottish League XI matches, winning on all seven of his appearances, with his solitary goal from the penalty sport against The Football League XI at Hampden Park. Haddock also played for a Glasgow Select XI on seven occasions, with all appearances in the annual challenge match against Sheffield between 1954–60, captaining the side on his last appearance.
- Scottish Cup (2): 1954–55, 1957–58
- Scottish Division Two (3): 1951–52, 1956–57, 1961–62
- B Division Supplementary Cup (1): 1951–52
- Franco-Scottish Friendship Cup (1): 1960–61 (joint-winners)
- Glasgow Cup (2): 1951–52, 1958–59
- Runner-up: 1949–50, 1956–57
- Glasgow Charity Cup (3): 1951–52 (shared), 1957–58, 1960–61 (shared)
- Runner-up: 1958–59
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- "The Day The Magyrs Came To Hampden". Scottish Football Philosopher. 8 December 2014. Retrieved 27 November 2011.
- "Scotland FL Players by Appearances". Londonhearts.com. London Hearts Supporters' Club. Retrieved 27 November 2011.
- "Scotland FL Players: Harry Haddock". Londonhearts.com. London Hearts Supporters' Club. Retrieved 24 June 2019.
- "Harry Haddock". SFAQ. Retrieved 24 June 2019.
- "CLYDE TO HONOUR HARRY HADDOCK". SPFL. 10 October 2012. Retrieved 23 June 2019.