From 1900 to 1924, Ernest Mangnall managed three teams.
Burnley Manchester United Manchester City 
He started his career in football management with Burnley in March 1900, when he was hired as the club's second official manager following the departure of Harry Bradshaw almost a year earlier. He started his management at Manchester United in 1903 and saw his team narrowly miss promotion in his first two seasons before success at the third attempt. He managed City from 1912 until 1924, the interruption of World War I would mean his spell there only covered eight Football League seasons however the Club did find success in wartime regional tournaments. 
