Robert Fleming Blyth (16 October 1869 – 7 February 1941) was a Scottish footballer and manager for Portsmouth from 1901 to 1904.
From there he was scouted by the Rangers, playing as a wing-half (1891–1894), followed by Preston North End (1894–1899), a brief spell at Dundee (1897), and Portsmouth (1899–1901).
According to the Portsmouth Evening News, Blyth was "the only man to rise from professional player to be chairman of his club through all the intermediate positions: Captain, player-manager, manager, director, and vice-chairman.
"[2] Blyth grew up in a poor mining village which managed to produce a number of football stars.
[6] He married Isabella Taylor,[7] with whom he had daughters Mary and Janet, and a son, Robert Blyth, who played for both Portsmouth and Southampton in the 1920s.