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|Full name||John James Haselden|
|Date of birth||3 August 1943|
|Place of birth||Doncaster, England|
|Height||5 ft 8 in (1.73 m)|
|Playing position||Central defender|
|1971–1972||→ Mansfield Town (Loan)||4||(0)|
|1991||Reading (caretaker manager)|
|* Senior club appearances and goals counted for the domestic league only|
Haselden played the professional game for 13 years and played for Doncaster Rovers, Rotherham United and had a loan spell at Mansfield Town.
Haselden started his career at Rotherham United in 1961. He spent 7 years at Rotherham and played 99 games. He then moved to hometown club Doncaster Rovers in 1968.
Doncaster Rovers were Haselden's hometown club and he was to make 172 appearances in the next 6 years. He also scored 20 goals. He also had a loan spell at Mansfield between 1971 and 1972 where he played 4 games. In 1974, he retired from the game and joined Mansfield Town's coaching staff.
In 1987, Haselden had a run out in a friendly at Reading, where he was working as coach, at the age of 45.
Haselden was Mansfield Town's First Team Coach and in his first season as coach Mansfield won the Fourth Division title.
Haselden joined Huddersfield Town in 1976 as physiotherapist/coach under Tom Johnston and was promoted to the manager's role in 1977 when the club's board voted him into the hot-seat. This role only lasted six months, though as Johnston came back to Huddersfield for a third time in 1977. In 1978 and when Johnston took Town to 91st in The Football League he retired and Mick Buxton was brought in as caretaker manager. When Buxton was given the role full-time he made Haselden his assistant manager and in their full season at the helm Town won the Fourth Division title. Town also gained promotion from Division Three in 1983. In 1986 Haselden was sacked by Town to free up the club's wage bill.
- As of 9 April 2009.
|Huddersfield Town||22 April 1977||29 September 1977||14||0||5||8||0|
|Reading (caretaker manager)||30 April 1991||10 May 1991||4||1||3||0||25|
Haselden joined Forest as physiotherapist where he worked for nine years before leaving to join Aston Villa in 2002. He left in 2004 for Notts County. He spent 4 years at Notts before being replaced by Paul Smith in July 2008.
- Fourth Division champions: 1968–69
- Fourth Division champions: 1974–75
- Simod Cup: 1987–88
- First Division runners-up: 1993–94
- Profile on a Huddersfield Town fansite (via archive.org)