Amateur career He went to St. Bees school in Cumbria. He then went to Cambridge University where he studied at St. Johns. Scoular played for
Cambridge University. He was also known as Jack. He twisted a knee in the inter-university match of 13 December 1906; and this injury curtailed any subsequent provincial and international career.
Provincial career He played for the
Provinces District side against the
Cities District side in
January 1906, while still with Cambridge University. Due to the knee injury, he was unable to play in the 1907 fixture and the same injury dashed further Scotland representation.
International career Qualified for both Scotland and England, Scoular chose to play for Scotland. He played for Scotland five times, selected in 1905 and 1906. In 1907, the
Dundee Courier of 21 January seemed unsympathetic to Scoular's twisted knee when he could not fulfil his selection to play against Wales. J. G. Scoular has cried off owing to injuries. Sloan will play full back. It is probable Scoular has played his last game. Scoular was originally selected in hope by the Scotland selectors but the injury could not heal sufficiently. ==Military career==