David Duff Holt (born 3 January 1936) is a Scottish former international footballer who played as a left back. During his playing career, Holt made more than 300 appearances in the Scottish Football League for Queen's Park, Heart of Midlothian and Partick Thistle between 1957 and 1970. Holt, who earned five caps for Scottish national side, also represented Great Britain at the 1960 Summer Olympics (being able to do so as he played for Queen's Park who operated on an amateur basis). He later worked as a taxi driver for many years.