[4] Barker joined Rangers from Linthouse in early 1892[5] and made an immediate impact by scoring three goals in his first five appearances.
[6] He achieved a similar impact at international level, scoring a hat-trick in the first of his two Scotland caps against Wales in March 1893.
He scored in his second, and what proved to be his last Scotland appearance, again against Wales, a year later in a 5–2 win.
[7] He scored for Rangers in their Scottish Cup triumph in 1894 against Celtic but left the club in 1896, returning to Linthouse for two seasons.
[5] Barker also made a career in Govan's shipbuilding industry, working as a draughtsman.