First full-time manager: Jack Robson – Robson was manager of Manchester United for 6 years and 10 months, starting on 28 December 1914, before pneumonia forced his retirement in October 1921.[68] Longest-serving manager: Sir Alex Ferguson – 26 years, 194 days (1,500 matches; 6 November 1986 to 19 May 2013)[69][70]