John Tait Robertson (25 February 1877 – 24 January 1935)[2] was a Scottish football player and manager who played mainly as a left half.
Robertson was the first player signed to Chelsea in 1905, and served as their player-manager in their first-ever season, in addition to scoring their first competitive goal.
[6][7] In April 1905, Robertson was the first player to be signed by the newly formed Chelsea Football Club for the role of manager, but continued to play as well (he was 28 years old at the time).
[5][11][12][13] With the sponsorship of Alfréd Brüll and a London fabric company, Robertson arrived in Hungary to coach MTK Budapest in 1911,[14][15] where he remained for two years before returning to Britain in 1913.
[15] Robertson was considered to be one of the coaches responsible for the development of football in Hungary between the 1910s and 20s, by introducing physical preparations and technical innervations to the Hungarian game.