Duncan Weir started his rugby with Cambuslang at Primary 2 level and went through the ranks to play senior rugby for the club.
Weir raced to the head of the RaboDirect PRO12 scoring charts early in season 2011/12, and was rewarded with a long-term Warriors contract extension. He was named in the RaboDirect PRO12 Dream Team and is widely regarded as one of the most talented young stand-offs in the British game. He started the last three games of Scotland's RBS 6 Nastions campaign in 2013.
A former pupil of Cathkin High School, Weir attracted the attention of a number of senior Scottish football clubs, including Celtic (for whom he signed for a short period), Aberdeen, Dunfermline and Kilmarnock, while he was playing football for Glasgow Athletic boys club.
However, Duncan decided to concentrate on rugby and has not looked back since.
The 2009/10 season saw him play his club rugby for Glasgow Hawks, train as a member of Scottish Rugby’s National Academy and studied for an HND in coaching at Cumbernauld College before he was promoted from the Scotland U19 squad up to the U20s.