|Full name||Jim McLaren|
|Date of birth||12 July 1897|
|Place of birth||Falkirk, Scotland|
|Date of death||16 November 1975(aged 78)|
|Place of death||Leicester, England|
|* Senior club appearances and goals counted for the domestic league only.
During his senior career, McLaren played in Scottish football for Bonnybridge Heatherbell and Stenhousemuir. His last season at Stenhousemuir was 1921–22, the club's first ever season in the Scottish Football League. In May 1922 McLaren transferred to English club Bradford City. He played for them for five seasons, before spending a further six at fellow Football League club Leicester City.
McLaren joined Watford in October 1933, aged 36. Under the management of Neil McBain and latterly Bill Findlay, he made 194 appearances in the Third Division South, 14 in the FA Cup and 18 in the Third Division South Cup. Prior to McLaren's arrival, Watford's best finish in the division was sixth place. By contrast, during McLaren's five full seasons at the club, Watford finished fourth three times, fifth once and sixth once. Aged 40, McLaren kept goal as Watford won the 1937 Third Division South Cup.
- Joyce, Michael (2004). Football League Players' Records 1888 to 1939. Nottingham: Tony Brown. p. 172. ISBN 1-899468-67-6.
- Jones, Trefor (1996). Watford Football Club Illustrated Who's Who. pp. 156, 268–269, 286. ISBN 0-9527458-0-1.
- "A brief history of Stenhousemuir Football Club". Stenhousemuir Football Club. Retrieved 1 November 2010.
- "Watford history 1918 to 1945". Brown, Tony. Statto.com. Archived from the original on 13 April 2011. Retrieved 1 November 2010.
- Jones, Trefor (1998). Watford Season by Season. p. 96. ISBN 0-9527458-1-X.