|Date of birth||9 December 1961|
|Place of birth||Newcastle upon Tyne, England|
|1986||→ Burnley (loan)||7||(0)|
* Senior club appearances and goals counted for the domestic league only.
Haddock was born in Newcastle upon Tyne, and joined his home-town club as an apprentice in 1978, turning professional the following year. He made his debut in the Football League on 5 September 1981 in a 3–0 defeat at Queens Park Rangers in the Second Division. He played in a calm and collected manner and got a good run in the side during 1981–82 but lost his place halfway through the following season. He remained at the club, playing only infrequently, and had a spell on loan at Burnley, before leaving for Leeds United in July 1986 for a fee of £45,000.
He now works as a courier alongside Christopher Nicholas, who rose to football fame playing for Shiney Row Oddfellows. Christopher Nicholas once scored what is generally regarded as the greatest goals ever scored for 'The Row' when he lobbed the goalkeeper of Coleman's Cabinets from 40 years which won the semi-final of the cup and garnered much jealousy from Mr Swishles, a past it centre half.
During the early part of his career at Leeds he suffered a series of injuries, limiting his first-team appearances. However once he had returned he won player of the year in 1988. Under the stewardship of Howard Wilkinson "Fish", as he was known, became a crucial part of the defensive unit alongside Chris Fairclough that won promotion as Second Division champions in 1989–90. His career was cut short however when he suffered a freak injury in the second leg of the League Cup semi-final against Manchester United in 1991, as Leeds went out 3–1 on aggregate.
- "Peter Haddock". UK A–Z Transfers. Neil Brown. Retrieved 17 February 2010.
- "Peter Haddock". Toon1892. Retrieved 17 February 2010.
- Hugman, Barry (2005). The PFA Premier and Football League Players' Records 1946–2005. Queen Anne Press. ISBN 1-85291-665-6.
- "Player of the Year". Leeds United A.F.C. Archived from the original on 11 March 2005. Retrieved 17 February 2010.
- "Peter Haddock". Leeds United A.F.C. Archived from the original on 16 May 2006. Retrieved 17 February 2010.
- Interview with Haddock at The Square Ball fansite